########################################### Table of Contents ########################################### 1. Conferences 1.1. Atomic, Molecular, and Optical systems as sensors of gravitational physics, Benasque, Spain 1.2. JGRG35, Tokyo, Japan 1.3. Black Holes III, Rome, Italy 1.4. Gravity 2027: RESCEU International Symposium on Quantum Aspects of Gravity, Tokyo, Japan 1.5. Theory Meets Experiment School 2026 - Gravitational Wave Physics, Florence, Italy 1.6. XIX Black Holes Workshop, Braga, Portugal 1.7. CosmoFONDUE, Geneva, Switzerland 1.8. Madrid Winter Workshop on Gravitational Physics, Madrid, Spain 1.9. Open Quantum Universe, University Park, PA, USA 1.10. GW170817: The Merger Heard and Seen Around the World, 10 Years Later and Beyond, Seattle, WA, USA 1.11. 14th Tux Winter Workshop on Quantum Gravity, Tux, Austria 1.12. LISA Spain Meeting 2026, Palma, Spain 2. Jobs 2.1. Expression of interest for postdoctoral positions in gravitational-wave cosmology, Rome, Italy 2.2. PhD position in mathematical physics, Nijmegen, The Netherlands 2.3. Postdoctoral positions in the Computational Relativistic Astrophysics, Potsdam, Germany 2.4. Postdoctoral Fellowships in Gravitational-wave Physics, Copenhagen, Denmark 2.5. Master's in Mathematical Physics, Troy, AL, USA 2.6. N3AS Physics Frontier Center Postdoctoral Positions, Berkeley, CA, USA 2.7. Postdoctoral Fellowship in Theoretical and Gravitational Wave Astrophysics, Copenhagen, Denmark 2.8. Assistant Professorship in Theoretical and Gravitational Wave Astrophysics, Copenhagen, Denmark 2.9. 3 Postdoc positions: Origins of Irreversibility, Nijmegen, The Netherlands 2.10. Associate Research Scholar at the Leinweber Forum for Theoretical Physics, Princeton, NJ, USA 2.11. Postdoc in Gravitational Physics, Quantum Field Theory in Curved Spacetime, and/or Extreme Electrodynamics, Tucson, AZ, USA 2.12. Fully Funded 4-Year PhD Studentship in Cosmology, Sheffield, UK 2.13. Postdoctoral Positions in Gravitational-Wave Science, Potsdam, Germany 2.14. Open Rank, Tenure-track Assistant Professor, Tenure-track Associate Professor or Professor in Theoretical Gravity Physics, Baton Rouge, LA, USA 2.15. PhD position in Gravitational Self-Force at Center of Gravity, Copenhagen, Denmark 2.16. The Center of Gravity: Exchange of researchers working on gravitational physics, Copenhagen, Denmark and Potsdam, Germany 2.17. Postdoctoral fellowships in gravitational physics and gravitational-wave astronomy, Baltimore, MD, USA 3. News and Codes 3.1. Topical Collection from Lemaitre Conference 2024 completed ============================================== 1. Conferences ============================================== 1.1. Atomic, Molecular, and Optical systems as sensors of gravitational physics, Benasque, Spain --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31466 Starting: 2026-12-06 to 2026-12-12 Location: Benasque, Spain Additional Information: https://benasque.org/2026amo/ Contact: germain.tobar[AT]fysik.su.se The past few years have seen several quantum leaps in the study of new regimes at the interface of relativity, gravity, and quantum theory. These advances have been driven by recent experimental developments in atomic, molecular, and optical (AMO) systems, as well as in macroscopic quantum systems, which have opened new possibilities for probing fundamental questions in gravitational physics and quantum mechanics. This workshop will bring together experimentalists and theorists working on AMO and macroscopic quantum systems capable of testing this interface. The central focus will be on emerging approaches to gravitational physics using quantum systems, including tests of the Dynamical Casimir Effect and other particle-creation effects such as the Unruh effect, as well as possible signatures of the quantisation of gravity in AMO systems. The core aim of the workshop is to bring together theoretical and experimental perspectives on low-energy quantum gravitational physics, to identify shared challenges and promising directions, and to encourage new connections. The programme will combine invited lectures, focused research talks selected from abstract submissions, open discussions, with ample opportunity for informal exchange and collaboration. The workshop will also highlight related themes such as quantum measurement models for gravity and the role of quantum sensors in exploring fundamentally new regimes of gravitational physics. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.2. JGRG35, Tokyo, Japan --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31473 Starting: 2026-11-30 to 2026-12-04 Location: Tokyo, Japan Additional Information: https://sites.google.com/view/jgrg35 Contact: jgrg35_loc[AT]googlegroups.com JGRG is a series of workshops held in Japan every year since 1991, which has provided a place where people can exchange ideas and pursue future trends of research. The workshop will cover a wide area of research related to general relativity and gravitation. A tentative list of invited speakers: Wen-Yuan Ai (TDL Institute) Tomohiro Harada (Rikkyo U.) Pierre Heidmann (Ohio State U.) Mareki Honma (Mizusawa VLBI Observatory) Kunihito Ioka (YITP, Kyoto U.) Jose Beltran Jimenez (U. of Salamanca) Thomas P. Sotiriou (U. of Nottingham) Gianmassimo Tasinato (Swansea U.) Benson Way (U. of Maryland) Important dates: October 9: Deadline for abstract submission October 30: Deadline for registration (without presentation) Scientific Organizing Committee: Hideki Asada (Hirosaki U.), Tomohiro Harada (Rikkyo U.), Kunihito Ioka (YITP),Akihiro Ishibashi (Nagoya U.), Keisuke Izumi (Nagoya U.), Ryusuke Jinno (Kobe U.), Sugumi Kanno (Kyushu U.), Kohei Kamada (HIAS, UCAS, Hangzhou), Tsutomu Kobayashi (Rikkyo U.), Kazunori Kohri (NAOJ), Koutarou Kyutoku (Chiba U.), Kei-ichi Maeda (Waseda U.), Hayato Motohashi (Tokyo Metropolitan U.), Shinji Mukohyama (YITP and RESCEU), Keiju Murata (Nihon U.), Atsushi Nishizawa (Hiroshima U.), Toshifumi Noumi (University of Tokyo), Ryo Saito (Yamaguchi U.), Takahiro Tanaka (Kyoto U.), Shinji Tsujikawa (Waseda U.), Yuko Urakawa(KEK), Masahide Yamaguchi (IBS/ Tokyo Institute of Technology), Shuichiro Yokoyama (Nagoya U.), Hirotaka Yoshino (Osaka Metropolitan U.) Local Organizing Committee: Takeshi Chiba, Takashi Hiramatsu, Hideo Iguchi, Keiju Murata, Fumiya Okamatsu, Ryotaku Suzuki, Kotaro Tamaoka +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.3. Black Holes III, Rome, Italy --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31475 Starting: 2027-08-23 to 2027-08-27 Location: Rome, Italy Additional Information: https://www.blackholes.science Contact: paolo.pani[AT]uniroma1.it Dear Colleagues, We are pleased to announce that registration for the Black Holes III conference is now open: https://www.blackholes.science The conference will take place in the Aula Magna of Sapienza University of Rome, from 23 to 27 August 2027. Black Holes III will bring together experts in black-hole physics, numerical relativity, black-hole perturbation theory, gravitational-wave astronomy, high-energy theory, quantum gravity, astrophysics, and data analysis to discuss the current status of the field and future prospects. Topics will include classical and quantum aspects of black holes, strong-field tests of gravity, black-hole spectroscopy and ringdown, numerical simulations, compact-object environments, black holes beyond General Relativity, black-hole thermodynamics, and connections with high-energy theory and cosmology. Further information about the conference will be shared in the coming months. Apologies if you have received this announcement more than once. Please feel free to share it with any students or colleagues who may be interested. Sincerely, The BH3 Scientific Organizing Committee Luca Buoninfante, Raul Carballo-Rubio, Vitor Cardoso, Francesco Di Filippo, Astrid Eichhorn, Paolo Pani +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.4. Gravity 2027: RESCEU International Symposium on Quantum Aspects of Gravity, Tokyo, Japan --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31480 Starting: 2027-02-15 to 2027-02-19 Location: Tokyo, Japan Additional Information: https://www.resceu.s.u-tokyo.ac.jp/symposium/gravity2027/index.html Contact: gravity2027resceu[AT]gmail.com Dear Colleagues, We are pleased to announce the international symposium "Gravity 2027: RESCEU International Symposium on Quantum Aspects of Gravity," which will be held on February 15-19, 2027, at the Research Center for the Early Universe (RESCEU), The University of Tokyo, Japan. For detailed information, including registration, please visit: https://www.resceu.s.u-tokyo.ac.jp/symposium/gravity2027/index.html The aim of the symposium is to foster comprehensive and in-depth discussions on the rapidly expanding frontiers of gravitational physics. The program will cover a wide spectrum of topics related to quantum aspects of gravity, including string/quantum gravity, quantum cosmology, quantum field theory in curved spacetime, inflationary quantum fluctuations, quantum effects on gravity experiments, and so on. Invited Speakers: Daniel Baumann (LeCosPA/Cambridge) Luca Buoninfante (IGFAE) Cedric Deffayet (ENS Paris) Claudia de Rham (Imperial College London/Salam Centre) Roberto Emparan (ICREA and Barcelona U.) Gregory Gabadadze (Simons Foundation/NYU) Ruth Gregory (King's College London) Sugumi Kanno (Kyushu) Renate Loll (Radboud U., Nijmegen) Dieter Luest (LMU, Max-Planck-Institute for Physics) Viatcheslav Mukhanov (LMU) Lisa Randall (Harvard)* Gary Shiu (Wisconsin-Madison) Yuko Urakawa (KEK) Masahito Yamazaki (IPMU) Additional invited speakers to be announced. * To be confirmed. Important Deadlines: November 15, 2026: Registration deadline for those who wish to give a presentation or request visa support November 30, 2026: Payment deadline for those who request visa support December 31, 2026: Registration deadline for participation only January 15, 2027: Payment deadline for those who do not request visa support All deadlines are in Japan Standard Time (JST). Local Organizing Committee: Simran Arora (KCGI/YITP), Tomohiro Fujita (Ochanomizu), Anamaria Hell (IPMU), Vikramaditya Mondal (YITP), Shinji Mukohyama (RESCEU/YITP; Chair), Kota Numajiri (YITP), Alexandre Pombo (RESCEU), Masroor C. Pookkillath (Waseda U.), Sergi Sirera (RESCEU), Kazufumi Takahashi (RESCEU; Scientific Secretary), Jun'ichi Yokoyama (IPMU/RESCEU) Scientific Organizing Committee: Katsuki Aoki (Saitama U.), Antonio De Felice (YITP), Francesco Di Filippo (Goethe U.), Mohammad Ali Gorji (IBS), Shinji Mukohyama (RESCEU/YITP), Naritaka Oshita (Kindai U.), Masroor C. Pookkillath (Waseda U.), Kazufumi Takahashi (RESCEU), Masahide Yamaguchi (IBS), Jun'ichi Yokoyama (IPMU/RESCEU) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.5. Theory Meets Experiment School 2026 - Gravitational Wave Physics, Florence, Italy --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31490 Starting: 2026-11-09 to 2026-11-20 Location: Florence, Italy Additional Information: https://www.ggi.infn.it/single-event.php?id=571 Contact: theory-meets-experiment-2026-organizers[AT]lists.ggi.infn.it Dear Colleague, We are excited to announce the upcoming school, Theory Meets Experiment 2026 - Gravitational Wave Physics: From Fundamental Principles to Next-Generation Observatories, taking place at the Galileo Galilei Institute in Florence from the 9th of November until the 20th of November 2026. Designed for early-career researchers and PhD students, this school bridges the gap between fundamental theory, data analysis and advanced experimental techniques in gravitational wave science. Analyzing current detector data and building future observatories requires close synergy between theorists and experimentalists. This program offers a collaborative platform to master both sides of the field, connect with leading experts and build lasting professional networks. Key Topics Covered: * Theoretical Modeling: Gravitational radiation theory, compact binary source dynamics, cosmological gravitational wave background. * Precision Instrumentation: Quantum squeezing, thermal and Newtonian noise mitigation, active control systems in laser interferometers. * Next-Gen Observatories: Strategies and signal analysis shaping the future of third-generation and space-borne detectors like the Einstein Telescope and LISA. Registration and Key Information: * Target Audience: PhD students, postdocs, and early-career researchers in physics and astrophysics. Motivated master students are also welcome. * Location: Galileo Galilei Institute (GGI), Florence (Italy) * Dates: 9-20 November 2026 (2 weeks) * Application Deadline: 29 September 2026 * More Information: Visit https://www.ggi.infn.it/single-event.php?id=571 for the full program and application instructions. * How to Apply: Visit https://www.ggi.infn.it/apply-ggi.php to apply. * Contact email: theory-meets-experiment-2026-organizers[AT]lists.ggi.infn.it Please feel free to forward this invitation to interested colleagues and students. We look forward to welcoming you to the school! Best regards, The Scientific Committee: Annalisa Allocca, Jerome Degallaix, Matteo Di Giovanni, Andrea Maselli, Andrea Mitridate, Albino Perego, Michele Redi +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.6. XIX Black Holes Workshop, Braga, Portugal --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31495 Starting: 2026-12-17 to 2026-12-18 Location: Braga, Portugal Additional Information: https://indico.lip.pt/event/2241/ Contact: xix-bhw[AT]lip.pt From astrophysics to high-energy physics, from information theory to quantum gravity, black holes have acquired an ever increasing role in fundamental physics, and are now part of the terminology of many important branches of observational, theoretical and mathematical physics. The Black Holes Workshops gather researchers working on physical and mathematical problems of black holes, both in their classical and quantum aspects, as well as their connections to general relativity and gravitation, string theory, cosmology, and astrophysics, and stimulate the interaction between all these issues. The workshop will take place at the University of Minho, in December 17 and 18, 2026. Researchers on black holes in all their aspects are invited to participate. Registration for the event will start on September 14th and end on November 30th. The deadline to submit abstracts is November 21st. A limited number of accepted contributions will be selected, taking into account their scientific merit. Submissions of abstracts after the deadline will not be allowed. In this edition there will be no registration fee for participants. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.7. CosmoFONDUE, Geneva, Switzerland --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31509 Starting: 2027-01-25 to 2027-01-29 Location: Geneva, Switzerland Additional Information: https://indico.cern.ch/event/1638385/ Contact: THworkshops.secretariat[AT]cern.ch While new discoveries in cosmology have revolutionized our understanding of the Universe over the past decades, many unresolved mysteries remain, such as the nature of dark energy or the physical processes occurring in the earliest stages of history. To resolve these questions in light of new observations, joint efforts across the whole community are needed. The conference Cosmological Fundamental Observables and Novel Discoveries in Universe Evolution (CosmoFONDUE) aims at offering an occasion for scientists across all fields of cosmology to interact in an engaging and inclusive atmosphere, and to reflect on promising new research directions. A special focus is put on fostering exchange among junior and senior researchers. The conference will cover a broad range of topics across the full redshift span, including: Inflation, pre-CMB cosmology CMB surveys Neutrino and particle cosmology Gravitational waves Galaxy surveys, large-scale structure observables Intensity mapping Supernovae Modified gravity Cosmological tensions Confirmed speakers: David Alonso (U. of Oxford) Tessa Baker (Portsmouth U., ICG) Julien Carron (U. Geneva) Edmund Copeland (Nottingham U.) Rachel Gray (U. of Glasgow) Kylar Greene (Seoul Natl. U. ) Lavinia Heisenberg (Heidelberg U.) Oksana Iarygina (NORDITA) Jae Hyeok Chang (Seoul Natl. U.) Elisabeth Krause (U. of Arizona) Sung Mook Lee (CERN) Vivian Poulin (U. Montpellier) Mickael Rigault (U. Lyon) Marta Spinelli (Observatoire de la Cote d'Azur) Licia Verde (ICCUB) Seokhoon Yun (Kyungpook Natl. U.) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.8. Madrid Winter Workshop on Gravitational Physics, Madrid, Spain --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31519 Starting: 2026-12-14 to 2026-12-16 Location: Madrid, Spain Additional Information: https://eventos.ucm.es/156263/detail/madrid-winter-workshop-on-gravitational... Contact: mwwgp2026[AT]gmail.com Dear colleagues, We are please to announce the Madrid Winter Workshop on Gravitational Physics, the 7th Edition of a series of workshops held in collaboration between Valencia and Madrid (Complutense) Universities (Spain). The workshop will take place this time at the Complutense University of Madrid (Spain) on December 14th-16th, 2026 and, as in previous editions, it will be held within a dual format, with on-site talks and online contributions as well. Everything will be broadcast live. In this seventh edition, we would like to maintain the informal and collaborative spirit of the previous editions, with a limited number of participants between 60 and 80. The idea of the workshop is to encourage everyone, from seniors to less-experienced students and postdocs, to present some results obtained during the last year that they find particularly relevant/interesting/easy to discuss in a relaxed way, possibly using the pdf of a paper already on arXiv or some handwritten notes of a current work in progress, and addressing a few simple questions: 1.- What is it about? 2.- Why is it important? (An explanation of what is unique and/or timely about this topic and the difference it might make with respect to previous work). 3.- Perspectives. The contributions are encouraged to be conceptual presentations with minimal calculations (if possible). The subsequent discussion and questions could extend as much as needed, depending on the audience participation. To be more concrete, we expect talks of about 10-15', though specific details will be settled once we have a clear picture of the number of participants. The idea is to have talks not too focused on technicalities (if the topic allows, obviously) but have more discussions which could lead to new works/collaborations in 2027 and beyond. A few selected speakers will provide more extended talks on particularly hot topics. A tentative deadline for abstract submission has been set on November 15th (confirmation of acceptance of talk will be made soon after) and for registration on November 25th. There is no registration fee to participate in this workshop. Looking forward to hearing from you, Diego Rubiera-Garcia (on behalf of the LOC) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.9. Open Quantum Universe, University Park, PA, USA --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2026/09/25/open-quantum-universe/ Starting: 2026-11-17 to 2026-11-19 Location: University Park, PA, USA Additional Information: https://sites.psu.edu/openquantumuniverse/ Contact: IGCEvents[AT]psu.edu The Open Quantum Universe Workshop at The Pennsylvania State University, supported by the Gravity Theory Trust, will be a focused event that aims to coordinate and stimulate significant recent interest in the understanding of cosmology as an open, out-of-equilibrium, quantum system. While these properties are clearly implied by the presence of an observer-dependent horizon and dynamical expansion, they are not naturally accommodated by the current theoretical frameworks for cosmology. The same properties are also at the core of condensed-matter physics and quantum information science. The goal of this workshop is to gather leading contributors to these topics from the cosmological side in order to address foundational questions in cosmology, and to foster cross-disciplinary connections by building on initiatives that include condensed-matter theorists. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.10. GW170817: The Merger Heard and Seen Around the World, 10 Years Later and Beyond, Seattle, WA, USA --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31539 Starting: 2027-08-16 to 2027-08-20 Location: Seattle, WA, USA Additional Information: https://www.int.washington.edu/programs-and-workshops/int-28 Contact: david.radice[AT]psu.edu Ten years after the first multi-messenger detection of a binary neutron star merger, this meeting will bring together researchers across gravitational-wave instrumentation and data analysis, radio, X-ray and optical astronomy, merger and kilonova modeling, and experts in dense-matter theory and nucleosynthesis. The goals are to consolidate what a decade of observation and modeling has taught us about GW170817, and to prepare the community for the next such event, which could arrive at any time. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.11. 14th Tux Winter Workshop on Quantum Gravity, Tux, Austria --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2026/09/30/14th-tux-winter-workshop-on-q... Starting: 2027-02-15 to 2027-02-19 Location: Tux, Austria Additional Information: https://indico.ecap.work/event/242/ Contact: tuxworkshop[AT]fuw.edu.pl The 14th Tux Winter Workshop on Quantum Gravity will take place on February 15 - 19, 2027 in Tux (Austria). The workshop aims to bring together experts on loop quantum gravity and related topics. In general, the topics of the workshops include: - All approaches to loop quantum gravity - Other approaches to quantum gravity and their relation to LQG - Quantum gravity phenomenology - Quantum gravity topics of general interest - General relativity and differential geometry topics of general interest The registration is open until November 30, 2026. For an up-to-date information on the workshop we recommend to visit the website. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.12. LISA Spain Meeting 2026, Palma, Spain --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31543 Starting: 2026-11-11 to 2026-11-13 Location: Palma, Spain Additional Information: https://indico.global/event/18642/overview Contact: antoni.ramos-buades[AT]uib.es We are pleased to announce that registration and abstract submission are now open for the LISA Spain Meeting 2026, which will take place on 11-12 November 2026 at the Institute of Applied Computing and Community Code (IAC3), University of the Balearic Islands (UIB), in Palma de Mallorca, Spain. The meeting will bring together members of the Spanish LISA community to present and discuss recent scientific developments across the different areas of LISA science and technology, strengthen interactions between groups, and exchange ideas on future activities in preparation for the mission. The scientific programme will include invited and contributed talks, poster presentations, and dedicated discussion sessions. We welcome contributions from across the LISA community, including waveform and source modelling, astrophysics, data analysis and searches, simulations, instrumentation, and other topics relevant to LISA. We particularly encourage early-career researchers to submit contributions and present their work. In addition to the two main meeting days, we will hold an optional focused session on the morning of Friday, 13 November, with hands-on activities and discussions on topics of particular interest to the Spanish community, including LISA strategies in Spain and activities connected to the Data Distributed Processing Centre (DDPC). Registration and abstract submission will remain open until 29 October 2026. Further information, registration, and abstract submission are available on the meeting website: https://indico.global/event/18642/overview There is no registration fee. Lunches and coffee breaks during the meeting will be provided to participants. We would be grateful if you could circulate this announcement among colleagues who may be interested. We look forward to welcoming you to Palma de Mallorca in November! +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ============================================== 2. Jobs ============================================== 2.1. Expression of interest for postdoctoral positions in gravitational-wave cosmology, Rome, Italy ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31453 Deadline: 2026-09-30 Location: Rome, Italy Additional Information: https://web.infn.it/GravitySirens/jobs-openings/ Contact: simone.mastrogiovanni[AT]roma1.infn.it We invite expressions of interest for postdoctoral positions at the Italian Institute for Nuclear Physics (INFN) in Rome, Italy. The postdoctoral positions will be funded under the European Research Council Starting Grant (ERC StG) GravitySirens. The postdocs will join the research group led by Dr. Simone Mastrogiovanni and will focus on gravitational-wave cosmology with dark standard sirens. The research group currently has 4 PhD students, 2 postdocs, and 3 master's students. INFN Rome is located inside Sapienza University, one of the largest Universities in Europe. Postdocs will have the opportunity to join the Virgo, Einstein Telescope, and Euclid groups in Rome. The INFN Virgo Rome group has about 35 researchers, including PhD students, postdocs, and 18 faculty. We are particularly eager to receive expressions of interest from candidates with experience in (i) Galaxy surveys from current facilities such as Vera Rubin LSST, Euclid, the Dark Energy Survey, (ii) Galaxy field-level inference and (iii) cosmological inference with cross-correlation of Large Scale Structure tracers. The postdoctoral positions are expected to start in 2027 and can be from 2 to 3 years depending on availability. All candidates must hold or soon be completing a Ph.D. in Physics, Astronomy or Astrophysics. Interested candidates should send (i) a motivation letter, (ii) a curriculum vitae, indicating the date the PhD was or will be awarded (iii) a research statement, and (iv) two contacts for reference letters. Expressions of interest should be sent via this Google Form: https://forms.gle/JnwiVYAw1gFoDiU98, and reference letters should be sent to Simone Mastrogiovanni (simone.mastrogiovanni[AT]roma1.infn.it). Candidates are encouraged to apply as soon as possible. The deadline for full consideration of the expressions of interest, including reference letters, is September 30th, 2027. Please feel free to forward this announcement to potential candidates. For any other information, please do not hesitate to reach out to Simone Mastrogiovanni (simone.mastrogiovanni[AT]roma1.infn.it). Best, Simone +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.2. PhD position in mathematical physics, Nijmegen, The Netherlands ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31465 Deadline: 2026-09-16 Location: Nijmegen, The Netherlands Additional Information: https://www.ru.nl/en/working-at/job-opportunities/phd-position-mathematical-... Contact: manus.visser[AT]ru.nl The Department of Mathematics at Radboud University and the Radboud Center for Natural Philosophy (RCNP) are looking for a PhD student to explore fundamental questions about black holes, entropy and irreversibility. This PhD position is part of the Origins of Irreversibility project funded by the John Templeton Foundation. Supervisor: Dr. Manus Visser, Promotor: Prof. Klaas Landsman. Starting date: Between October 1 and December 1, 2026. Duration: 4 years. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.3. Postdoctoral positions in the Computational Relativistic Astrophysics, Potsdam, Germany ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31467 Deadline: 2026-12-13 Location: Potsdam, Germany Additional Information: https://www.aei.mpg.de/1496849/cra-postdoc-2027?c=26171 Contact: matthias.blittersdorf[AT]aei.mpg.de The "Computational Relativistic Astrophysics" division at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute; AEI) in Potsdam led by Masaru Shibata (director) announces the opening of postdoc appointments. Each available postdoctoral position will be for a duration of 2 - 3 years. The "Computational Relativistic Astrophysics" division is currently composed of two group leaders (Kenta Kiuchi, Kyohei Kawaguchi), 1 senior scientist (Takami Kuroda), and several postdoc researchers and students, and focuses on several research topics in relativistic astrophysics including neutron star mergers, collapsars, nucleosynthesis, stellar core collapse and explosion, formation and evolution of very massive and supermassive black holes, and multi-messenger astrophysics. The researchers in the "Computational Relativistic Astrophysics" division can use high-performance computers at the Max Planck Computing and Data Facility (MPCDF: https://www.mpcdf.mpg.de). To apply for a postdoctoral position at the AEI in Potsdam, please fill out this form. Applicants will be asked to upload a cover letter, curriculum vitae, list of publications and statement of research interests. Applicants will need to indicate the names of three referees for recommendation letters. Referees will be notified by email on how to upload the letters (in case of problems referees could send the letters directly to nrjobs[AT]aei.mpg.de). The deadline for the full consideration is December 13th, 2026. The positions will be available from September 1st 2027. The salary and social benefits (e.g. health insurance) are based on the collective labor agreement "TVOED Bund" for the German public sector, usually at pay grade E13 (if the qualifications according to TVOED are met). A projection of the gross and net salary based on the TVOED regulations will be prepared in case an offer is made. The Max Planck Institute for Gravitational Physics is an equal opportunity employer, and is committed to provide employment opportunities to all qualified applicants without regard to race, color, religion, age, gender identity, sexual orientation or national origin. The Max Planck Society is committed to increasing the number of individuals with disabilities in its workforce and therefore encourages applications from such qualified individual. The AEI and the Max Planck Society welcome persons with diverse backgrounds, experiences, and ideas who embrace and value diversity and inclusion (Code of Conduct). The institute promotes a healthy work-life balance by offering all employees a family support service, cooperation with a nearby international kindergarten, as well as an in-house parent-child office and nursing room. For further information, please contact Matthias Blittersdorf: matthias.blittersdorf[AT]aei.mpg.de. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.4. Postdoctoral Fellowships in Gravitational-wave Physics, Copenhagen, Denmark ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2026/09/09/postdoctoral-fellowships-in-g... Deadline: 2026-11-15 Location: Copenhagen, Denmark Additional Information: https://academicjobsonline.org/ajo/jobs/32641 Contact: vitor.cardoso[AT]nbi.ku.dk The Center of Gravity at the Niels Bohr Institute invites expressions of interest for Postdoctoral Fellowships in Gravitational Wave Astrophysics for a fixed period of up to four (3+1) years. The preferred starting date is Fall 2027. Postdoctoral Fellows at the Niels Bohr Institute have the opportunity to guide more junior fellows, teach courses at various levels, participate in outreach activities, and organize international meetings. Interested individuals are encouraged to upload all material before November 15th, 2026. The search will remain open until finished. We seek international outstanding individuals eager to join an ambitious research program addressing the exploration of black holes as engines of discovery. This call is seeking specifically outstanding candidates to study the effect of environments in gravitational wave physics and data analysis strategies to robustly identify these in future events. However, outstanding individuals in complementary fields are also warmly welcomed to upload their material. We are also looking for a candidate to join the GWSky project (https://gwsky.org/). This project, funded by an ERC Synergy Grant, aims to use gravitational-wave measurements by existing and future observatories on the Earth and in space as precision laboratories for fundamental physics, cosmology, and astrophysics. The GWSky project aims to develop a groundbreaking framework capable of solving the highly nonlinear equations of Einstein's General theory of Relativity, creating waveform models with unprecedented accuracy, and translating these results into practical tools for interpreting the data. For the GWSky position we are primarily looking for candidates in the field of Gravitational Self-Force and its applications to gravitational waveform modelling. While previous experience in this field is desirable, expressions of interest from excellent candidates with relevant related expertise will be considered. This search is part of a vigorous expansion at the Niels Bohr Institute into the field of Gravitational Physics, bringing together several scientists from several areas of theoretical physics and astrophysics, and addressing some of the most burning questions related to gravity. The Center of Gravity (CoG) is a center for new ideas about the foundations of physics. We bring together cutting-edge research in observations of black holes and in the formal theory of relativistic and quantum aspects of gravity, completing the visions of Bohr and Einstein for the gravitational interaction. Our research endeavor spans from data analysis to theoretical disciplines within astrophysics and high-energy physics, and we aim to drive gravitational-wave physics to an exciting future. We have our physical home in the beautiful and legendary building at Blegdamsvej 17, established by Niels Bohr. This is the place where quantum theory was born and where many exciting new developments in gravity are now taking place. Today, the Niels Bohr Institute carries an important legacy in physics and is one of the leading institutes in theoretical and experimental physics. At the Center of Gravity, we hope to carry on the pioneering spirit that has defined our predecessors at the Niels Bohr Institute through trailblazing and fundamental research. The University of Copenhagen wishes to reflect the diversity of society and welcomes all qualified individuals regardless of personal background. Postdoctoral Fellows at the University of Copenhagen receive a competitive salary (including pension) and funds for travel and computing. Generous parental leave, state-subsidized childcare, vacation, and full medical care are provided to employees in Denmark. A favorable tax scheme is generally granted to international researchers. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.5. Master's in Mathematical Physics, Troy, AL, USA ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31493 Deadline: 2027-01-01 Location: Troy, AL, USA Additional Information: https://spectrum.troy.edu/crc/MastersInMath_Phys.html Contact: relativity[AT]troy.edu The Department of Mathematics and Statistics and the Center for Relativity and Cosmology at Troy University are accepting applications for a master's in mathematical physics focusing on mathematical relativity, starting August 1, 2027. Our curriculum includes a study of global Lorentzian geometry, causal structure, singularity theorems, the initial value problem of the Einstein equations, quantum fields in curved spacetimes and Hawking radiation. The program offers research opportunities and funding possibilities. If you are interested in funding, email us before starting the application. The email should contain a brief cover letter expressing your interest in the teaching assistant position, your academic goals and a description of your background in mathematics and physics. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.6. N3AS Physics Frontier Center Postdoctoral Positions, Berkeley, CA, USA ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2026/09/18/n3as-physics-frontier-center-... Deadline: 2026-12-07 Location: Berkeley, CA, USA Additional Information: https://academicjobsonline.org/ajo/jobs/32732 Contact: francois.foucart[AT]gmail.com N3AS Physics Frontier Center Fellows The NSF Physics Frontier Center Network for Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) intends to make two postdoctoral Fellow appointments for positions starting in fall 2027. N3AS is a multi-institutional collaboration linking thirteen partners: UC Berkeley, UC San Diego, U. Kentucky, Los Alamos National Laboratory, U. Minnesota, U. of New Hampshire, North Carolina State U., Northwestern U., Notre Dame U., Ohio U., Pennsylvania State U., U. Washington, and U. Wisconsin. N3AS research focuses on theoretical issues in multi-messenger astrophysics. Topics include dark matter, dense matter, neutrino physics, nucleosynthesis, neutron stars and their mergers, supernovae, and associated gravitational wave physics. N3AS interests also include fundamental symmetries and weak interactions. N3AS provides a unique multi-disciplinary environment for postdoctoral Fellows to address fundamental questions in astrophysics, cosmology, nuclear physics, and particle physics. All N3AS appointments are made through UC Berkeley. N3AS postdocs spend their initial two years at one of the N3AS host institutions. This year the available hosts are U. Kentucky and Los Alamos National Laboratory. N3AS Fellows then continue for a third year, moving to new Network institution of their choice (all sites are available). Fellow salaries depend on experience, beginning at $78K for new PhDs. N3AS provides a generous allowance to enable travel to other N3AS institutions and to support collaborative research, as well as a relocation allowance. Candidates should have a recent Ph.D. (on or after August 2024) in theoretical physics or astrophysics and the ability to work productively within a diverse and collaborative research environment, producing and publishing original research, and defending that research effectively in seminars and scientific meetings. Requested application materials: Please submit a CV, a publication list, a statement of research interest, and three letters of reference. Materials should be submitted online at AJO. The N3AS Fellows selection committee includes all N3AS faculty. Interested candidates are requested to submit their applications before December 7, 2026, to ensure full consideration. For further inquiries, please contact one of the members of the search committee, at the email addresses below. Fellow benefits packages will be continuous over the three-year appointments, provided through UC Berkeley. UC Berkeley is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, age, or protected veteran status. Contacts: Christian Drischler (drischler[AT]ohio.edu), Vincenzo Cirigliano (cirigv[AT]uw.edu), Jim Lattimer (james.lattimer[AT]stonybrook.edu) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.7. Postdoctoral Fellowship in Theoretical and Gravitational Wave Astrophysics, Copenhagen, Denmark ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31503 Deadline: 2026-11-15 Location: Copenhagen, Denmark Additional Information: https://academicjobsonline.org/ajo/jobs/32776 Contact: mpessah[AT]nbi.dk The Niels Bohr International Academy (NBIA) at the Niels Bohr Institute invites expressions of interest for a three-year postdoctoral fellowship in theoretical and gravitational wave astrophysics. The appointment is expected to begin in fall 2027, but other starting dates can be negotiated. The postdoctoral fellow will join the Theoretical Astrophysics Group led by Martin Pessah and develop research projects as part of a major expansion supported by an ERC Advanced Grant and the Carlsberg Foundation's Semper Ardens Accomplish Grant. A main goal of the program is to bring together astrophysical fluid dynamics and gravitational wave astrophysics to understand the environments leading to compact binary mergers, from stellar-mass compact objects to supermassive black holes. A central focus is the formation, evolution, and observable signatures of black-hole binaries in turbulent, magnetized disks around supermassive black holes. Candidates with relevant expertise from other areas will receive full consideration. We seek a researcher with a record of original research contributions and the ability to develop creative and independent research. We particularly welcome candidates whose complementary expertise can open new directions for the Theoretical Astrophysics Group. The postdoctoral fellow will be encouraged to pursue their own research ideas and collaborations while contributing to the broader scientific program. The postdoctoral fellow will have opportunities to mentor students and junior researchers and to co-organize international workshops and PhD schools. There will also be opportunities to participate in teaching, outreach activities, and the organization of seminars. The fellow will have access to travel funding and the Tycho high-performance computing facility, which includes more than 10,000 CPU cores and GPU resources. NBIA is an international center for fundamental research in theoretical physics. NBIA provides an open intellectual environment where researchers can pursue their own questions and exchange ideas across disciplines. It brings together researchers across astrophysics, gravitational physics, particle physics, quantum sciences, and soft matter physics. NBIA also hosts seminars, international visitors, workshops, and PhD schools. Its research in black-hole dynamics, gravitational-wave modeling, and multimessenger astrophysics offers further opportunities for collaboration. NBIA members interact and collaborate with the larger community of scientists in Copenhagen, including the Center of Gravity, DAWN, DARK, and StarPlan. Interested candidates should submit a cover letter, CV, publication list, and a research statement describing previous achievements, future directions, and connections to the program via Academic Jobs Online by November 15, 2026. Expressions of interest received after this date may also be considered. Applicants should hold a PhD in astrophysics, physics, or a closely related field by the starting date of the appointment. Employees at the University of Copenhagen receive a competitive salary, including pension. Denmark offers generous parental leave, subsidized childcare, six weeks of paid vacation, and access to public healthcare. Eligible international researchers may also benefit from Denmark's special researcher tax scheme. Copenhagen is a beautiful, family-friendly city with a large international community, a lively and diverse cultural scene, and a very high quality of life. The University of Copenhagen welcomes all qualified applicants regardless of personal background. Scientific inquiries may be addressed to Martin Pessah with email subject ASTRO27PDR. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.8. Assistant Professorship in Theoretical and Gravitational Wave Astrophysics, Copenhagen, Denmark ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31504 Deadline: 2026-11-15 Location: Copenhagen, Denmark Additional Information: https://academicjobsonline.org/ajo/jobs/32737 Contact: mpessah[AT]nbi.dk The Niels Bohr International Academy (NBIA) at the Niels Bohr Institute invites expressions of interest for a fixed-term assistant professorship in theoretical and gravitational wave astrophysics. The appointment will be for four years, with the possibility of a one-year extension. The appointment is expected to begin in fall 2027, but other starting dates can be negotiated. The assistant professor will join the Theoretical Astrophysics Group led by Martin Pessah and is expected to develop and lead research projects as part of a major expansion supported by an ERC Advanced Grant and the Carlsberg Foundation's Semper Ardens Accomplish Grant. A main goal of the program is to bring together astrophysical fluid dynamics and gravitational wave astrophysics to understand the environments leading to compact binary mergers, from stellar-mass compact objects to supermassive black holes. A central focus is the formation, evolution, and observable signatures of black-hole binaries in turbulent, magnetized disks around supermassive black holes. Candidates with relevant expertise from other areas will receive full consideration. We seek a researcher with a strong record of original research contributions and a clear scientific vision. The successful candidate will develop an ambitious and independent research program. We particularly welcome candidates whose complementary expertise can open new directions for the Theoretical Astrophysics Group. We envision that this position can provide a foundation for establishing an independent research group through a successful grant application to a Danish or European research agency. Assistant professors at NBIA receive mentoring and support in applying for these grants. The assistant professor will have the opportunity to mentor students and junior researchers and will also be given freedom to co-organize international workshops and PhD schools. There is an opportunity to launch and run a new seminar program in the field. Teaching responsibilities are limited and provide opportunities to engage with students. The assistant professor will have access to travel funding and the Tycho high-performance computing facility, which includes more than 10,000 CPU cores and GPU resources. NBIA is an international center for fundamental research in theoretical physics. NBIA provides an open intellectual environment where researchers can pursue their own questions and exchange ideas across disciplines. It brings together researchers across astrophysics, gravitational physics, particle physics, quantum sciences, and soft matter physics. NBIA also hosts seminars, international visitors, workshops, and PhD schools. Its research in black-hole dynamics, gravitational-wave modeling, and multimessenger astrophysics offers further opportunities for collaboration. NBIA members interact and collaborate with the larger community of scientists in Copenhagen, including the Center of Gravity, DAWN, DARK, and StarPlan. Interested candidates should submit a cover letter, CV, publication list, and a research statement describing previous achievements, future directions, and connections to the program via Academic Jobs Online by November 15, 2026. Expressions of interest received after this date may also be considered. Applicants should hold a PhD in astrophysics, physics, or a closely related field by the starting date of the appointment. Employees at the University of Copenhagen receive a competitive salary, including pension. Denmark offers generous parental leave, subsidized childcare, six weeks of paid vacation, and access to public healthcare. Eligible international researchers may also benefit from Denmark's special researcher tax scheme. Copenhagen is a beautiful, family-friendly city with a large international community, a lively and diverse cultural scene, and a very high quality of life. The University of Copenhagen welcomes all qualified applicants regardless of personal background. Scientific inquiries may be addressed to Martin Pessah with email subject ASTRO27PROF. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.9. 3 Postdoc positions: Origins of Irreversibility, Nijmegen, The Netherlands ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31512 Deadline: 2026-10-14 Location: Nijmegen, The Netherlands Additional Information: https://www.ru.nl/en/working-at/job-opportunities/postdoc-positions-origins-... Contact: manus.visser[AT]ru.nl 3 Postdoc positions: Origins of Irreversibility, Radboud University, Nijmegen, The Netherlands Application deadline: 14 October 2026. Starting date: Between January 1 and September 1, 2027. Duration: 2 years per position Link: https://www.ru.nl/en/working-at/job-opportunities/postdoc-positions-origins-... The Radboud Center for Natural Philosophy (RCNP) are looking for three postdocs to explore fundamental questions about entropy, chaos and irreversibility: one in mathematical physics, one in theoretical physics and one in history of physics. These positions are part of the Origins of Irreversibility project funded by the John Templeton Foundation. Supervisors: Prof. Klaas Landsman, Dr. Manus Visser, Dr. Marij van Strien. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.10. Associate Research Scholar at the Leinweber Forum for Theoretical Physics, Princeton, NJ, USA ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2026/09/24/associate-research-scholar-at... Deadline: 2026-11-30 Location: Princeton, NJ, USA Additional Information: https://apply.interfolio.com/192724 Contact: jjupiter[AT]princeton.edu The Leinweber Forum for Theoretical Physics at Princeton University invites exceptional Ph.D. recipients for an honorific postdoctoral fellowship program. The Leinweber Forum at Princeton was recently established by a generous gift from the Leinweber Foundation. Princeton joins as the ninth member of the Leinweber institutes for theoretical physics, which is focused on advancing curiosity-driven research on the theoretical principles underlying the physical universe. The forum will be an interdisciplinary hub, drawing researchers from the departments of physics, astrophysical sciences and mathematics working on topics connected to high-energy theoretical physics, gravitational physics, gravitational astrophysics, cosmology, and the mathematics research underpinning these areas. Appointments, to be made at the rank of Associate Research Scholar, will be for three years with an anticipated start date of September 1, 2027. The work location for this position is in-person on campus at Princeton University. This position is subject to the University's background check policy. To apply please submit a cover letter (which can include a research statement of up to three pages in length), CV, and contact information for three references. PhD must be completed prior to the start of the appointment. To ensure full consideration, all materials, including letters of reference, must be received by November 30, 2026. Equal Employment Opportunity Statement Princeton University is an Equal Opportunity Employer and all qualified applicants will receive consideration for employment without regard to age, race, color, religion, sex, sexual orientation, gender identity or expression, national origin, disability status, protected veteran status, or any other characteristic protected by law. Pay Transparency Disclosure The University considers factors such as (but not limited to) the scope and responsibilities of the position, candidate's qualifications, work experience, education/training, key skills, market, collective bargaining agreements as applicable, and organizational considerations when extending an offer. The posted salary range represents the University's good faith and reasonable estimate for a full-time position; salaries for part-time positions are pro-rated accordingly. The University also offers a comprehensive benefits program to eligible employees. Please see the linked ad for more information. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.11. Postdoc in Gravitational Physics, Quantum Field Theory in Curved Spacetime, and/or Extreme Electrodynamics, Tucson, AZ, USA ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2026/09/24/postdoc-at-arizona-in-gravita... Deadline: 2026-11-01 Location: Tucson, AZ, USA Additional Information: https://sgralla.arizona.edu Contact: sgralla[AT]arizona.edu The departments of Physics and Astronomy at the University of Arizona invite applications for a postdoctoral research position in gravitational physics, quantum field theory in curved spacetime, and/or extreme electrodynamics. The group consists of faculty Sam Gralla and Vasilis Paschalidis, affiliate faculty Paul Anderson, together with graduate students and postdoctoral researchers. We welcome applicants whose research areas overlap or complement our efforts in theoretical and computational general relativity, quantum field theory in curved spacetime and background electromagnetic fields, radio and optical interferometry, and compact object astrophysics. The successful applicant will interact with the core gravitational group and benefit from proximity to neighboring faculty including Kate Alexander, Chad Bender, CK Chan, Callum Jones, Dan Marrone, and Dave Sand. Interested applicants should directly email Prof. Sam Gralla at sgralla@arizona.edu with a short statement of interest and a CV. Letters of recommendation will be requested for select candidates only. Applications should be received by Nov 1, 2026 for full consideration. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.12. Fully Funded 4-Year PhD Studentship in Cosmology, Sheffield, UK ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31516 Deadline: 2026-10-31 Location: Sheffield, UK Additional Information: https://gravity-cosmology.sites.sheffield.ac.uk/phd-projects Contact: e.divalentino[AT]sheffield.ac.uk Applications are invited for a fully funded 4-year PhD studentship at the University of Sheffield, working with Dr Eleonora Di Valentino on cosmological tensions. The project will investigate current challenges to the standard cosmological model, with a particular focus on cosmological tensions and their possible implications for new physics. Start date: 2027 (to be agreed with the successful candidate) Funding: Fully funded for 4 years Eligibility: UK Home students only. Unfortunately, international applicants are not eligible for this studentship. Application deadline: 31 October 2026 Applications should be submitted through the University of Sheffield PhD application system: https://www.sheffield.ac.uk/postgraduate/phd/apply/applying Prospective applicants who would like further information or to discuss the project are very welcome to contact Eleonora Di Valentino at e.divalentino@sheffield.ac.uk. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.13. Postdoctoral Positions in Gravitational-Wave Science, Potsdam, Germany ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2026/09/25/postdoctoral-positions-in-gra... Deadline: 2026-11-23 Location: Potsdam, Germany Additional Information: https://www.aei.mpg.de/1513474/acr-postdoc-2027 Contact: acr-jobs[AT]aei.mpg.de The "Astrophysical and Cosmological Relativity" (ACR) department at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute, AEI) in Potsdam invites applications for several postdoctoral appointments in gravitational-wave science, offered at different levels according to experience and seniority, with durations from two to five years. We are looking for creative, highly motivated researchers who work equally well independently and within a large, interdisciplinary group. Candidates are encouraged to apply as early as possible. The deadline for full consideration is 23 November 2026, including receipt of reference letters. Applications will be considered until all positions are filled. The anticipated start date of the positions is Fall 2027. The complete announcement and instructions how to apply can be found by following the provided external link: https://www.aei.mpg.de/1513474/acr-postdoc-2027 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.14. Open Rank, Tenure-track Assistant Professor, Tenure-track Associate Professor or Professor in Theoretical Gravity Physics, Baton Rouge, LA, USA ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2026/09/26/open-rank-tenure-track-assist... Deadline: 2027-03-24 Location: Baton Rouge, LA, USA Additional Information: https://lsu.wd1.myworkdayjobs.com/LSU/job/0202-JW-Nicholson-Hall/Open-Rank--... Contact: pullin[AT]lsu.edu The Department of Physics and Astronomy at Louisiana State University (LSU) invites applications for an open rank tenure track faculty position at the assistant professor, tenure-track associate professor, or tenured professor level. Areas of interest include, but are not limited to, theoretical gravity, including quantum and semiclassical gravity, quantum field theory in curved spacetime, relativistic quantum information, numerical relativity, time domain and multimessenger astrophysics, computational high energy astrophysics, nuclear astrophysics, and relativistic plasma astrophysics. The appointment will be made at the rank commensurate with the candidate's qualifications, experience, achievements, and the duties of the position. Candidates at all three ranks are encouraged to apply. The Department consists of faculty working in a broad range of disciplines, including theoretical and observational astrophysics, astroparticle and multimessenger astrophysics, neutrino physics, atomic, molecular, and optical physics, quantum information science, theoretical and experimental condensed matter physics, materials science, theoretical and experimental high energy physics and nuclear physics, theoretical general relativity and quantum gravity, experimental gravitational wave detection, and medical physics. The Department of Physics and Astronomy is one of LSU's premier research departments with 52 faculty members, 19 postdoctoral researchers, 123 graduate students, and 18 staff. Grants and contracts support totals more than $8.5 million per year. Major research facilities available to faculty include a 1.5 GeV synchrotron light source at LSU's Louisiana Light Source, the NSF's Laser Interferometer Gravitational Wave Observatory (LIGO) located in Livingston Parish less than 30 minutes from LSU, and the Center for Computation and Technology (CCT), an interdisciplinary research center with excellent supercomputing facilities. See https://www.lsu.edu/physics/ for complete information. LSU, located in Baton Rouge about 70 miles from New Orleans, is the flagship institution of the Louisiana State University System. It is a Research I university with an enrollment of 37,825 students, including 4,704 at the graduate level. For more information, visit the http://www.lsu.edu. Responsibilities: The successful candidate will be expected to establish or strengthen an independent research program, teach at the undergraduate and graduate levels, supervise graduate student research, and participate in appropriate departmental and professional service. The candidate will be expected to develop collaborations within the Department and across related units at LSU. Required Qualifications: (All levels) PhD in physics, astronomy, or a closely related field. (Assistant professor) Candidates who have completed all requirements for the doctorate except the dissertation will be considered, provided the degree is conferred by the employment start date; and clearly demonstrate potential for excellence in research, teaching, and other scholarly activity. (Associate professor) Minimum of three years as an assistant professor or equivalent experience and have a sustained record of scholarly productivity, evidence of research and teaching excellence, experience in student mentoring, and professional recognition. (Professor) Minimum of five years of experience as an associate professor or equivalent experience and have a distinguished and sustained record of research, teaching, mentoring, leadership, and professional service, together with national and/or international recognition appropriate to the field. Additional Job Description: Special Instructions: All candidates must provide a record appropriate to their career stage of research excellence or clear potential for research excellence, as evidenced by peer reviewed publications or comparable scholarly contributions, and a commitment to teaching undergraduate and graduate courses in physics and astronomy. Attach ALL documents under the Resume/CV section of the application. Applicants must provide a cover letter, curriculum vitae, statement of research experience and accomplishments, research plan, teaching philosophy, statement of broader impacts, and the names and contact information for at least three references. Official transcripts are required prior to hire. For questions or additional information, please contact Dr. Jorge Pulin at pullin[AT]lsu.edu. The anticipated hire date is Fall 2027. Salary will be commensurate with qualifications and experience. An offer of employment is contingent on a satisfactory pre-employment background check. The committee will start reviewing applications on October 15 and will continue until the position is filled. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.15. PhD position in Gravitational Self-Force at Center of Gravity, Copenhagen, Denmark ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31532 Deadline: 2026-12-15 Location: Copenhagen, Denmark Additional Information: https://academicjobsonline.org/ajo/jobs/32852 Contact: Maarten.Meent[AT]nbi.ku.dk The Center of Gravity at the Niels Bohr Institute (NBI) invites expressions of interest for a PhD fellowship in gravitational-wave theory and solutions to the relativistic 2-body problem under the supervision of Maarten van de Meent. The preferred starting date is Fall 2027. To receive full consideration, interested candidates should upload the material requested below before December 15th, 2026. The search will remain open until the optimal candidate is found. Successful candidates will join the GWSKy project, funded by an ERC Synergy Grant. We are particularly interested in hiring creative and highly motivated candidates who can work collaboratively in a vibrant, welcoming, and synergistic group. The ERC-funded project called "Making sense of the unexpected in the gravitational-wave sky (GWSky)" is led by PIs Maarten van de Meent (NBI, Copenhagen, Denmark), Enrico Barausse (SISSA, Trieste, Italy), Zvi Bern (University of California, Los Angeles, US), and Alessandra Buonanno (Albert Einstein Institute, Potsdam). Given the synergistic aspect of the GWSky project, we anticipate the possibility of PhD students having a co-supervisor at one of the other nodes, and for them having the opportunity to have extended visits there. The aim of the GWSky project is to use gravitational-wave measurements by existing and future observatories on the Earth and in space as precision laboratories for fundamental physics, cosmology, and astrophysics. This includes the current LIGO-Virgo-KAGRA detectors, as well as the future ground-based observatories Cosmic Explorer and Einstein Telescope, and the space-based detector LISA. By leveraging the PIs and their team's expertise, the GWSky project aims to develop a groundbreaking framework capable of solving the highly nonlinear equations of Einstein's General theory of Relativity, creating waveform models with unprecedented accuracy, and translating these results into practical tools for interpreting the data. Possible topics include: development of gravitational self-force methods at second order in the mass-ratio; incorporation of environmental and/or beyond GR effects in the self-force formalism; and utilization of self-force data to enhance effective-one-body waveform models. The Center of Gravity (CoG) is a center for new ideas about the foundations of physics. We bring together cutting-edge research in observations of black holes and in the formal theory of relativistic and quantum aspects of gravity, completing the visions of Bohr and Einstein for the gravitational interaction. Our research endeavor spans from data analysis to theoretical disciplines within astrophysics and high-energy physics, and we aim to drive gravitational-wave physics to an exciting future. We have our physical home in the beautiful and legendary building at Blegdamsvej 17, established by Niels Bohr. This is the place where quantum theory was born and where many exciting new developments in gravity are now taking place. Today, the Niels Bohr Institute carries an important legacy in physics and is one of the leading institutes in theoretical and experimental physics. At the Center of Gravity, we hope to carry on the pioneering spirit that has defined our predecessors at the Niels Bohr Institute through trailblazing and fundamental research. The University of Copenhagen wishes to reflect the diversity of society and welcomes expressions of interest from all qualified candidates regardless of personal background. PhD students at the University of Copenhagen receive a competitive salary (including pension) and funds for travel and computing. Generous parental leave, state-subsidized childcare, vacation, and full medical care are provided to employees in Denmark. For any inquiries, kindly send an email to Maarten.Meent[AT]nbi.ku.dk, with email subject "PhD Fellowship in Gravitational Self-Force" +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.16. The Center of Gravity: Exchange of researchers working on gravitational physics, Copenhagen, Denmark and Potsdam, Germany ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31533 Deadline: 2026-11-30 Location: Copenhagen, Denmark and Potsdam, Germany Additional Information: https://the-center-of-gravity.com/join-us/ Contact: nils.siemonsen[AT]nbi.ku.dk Grants for short term scientific missions (STSMs) are available to visit and work on research projects within the Center of Gravity (CoG), a DNRF Center of Excellence at the Niels Bohr Institute and at the AEI Astrophysical and Cosmological Relativity Department, a partner of CoG. We are inviting you to submit proposals for STMSs starting after April, 2027 and ending before October 1, 2027 (applications outside this timeframe will be discarded). We are looking for exciting and challenging research proposals to be developed jointly with our members. We value high risk/high gain proposals at the boundary between different research directions within CoG. STSMs are a great opportunity for all scientists within the community to exchange visits, nurture collaborations, or develop new ones. This call starts on October 1 and closes Nov 30, 2026. All proposals will be reviewed and the results will be announced by Jan 1, 2027. The selection committee will take into account the matching of funds by the host, gender diversity, the scientific proposal and the experience of the applicant (preference is given to Early Career Investigators). A STSM application should include, 1. Name and contact of applicant and name of CoG member with whom the visit was discussed 2. A single pdf with - proposal title - brief CV of the applicant (2 pages) - short description of the proposed project work (1 page max) - motivation letter (1 page max) - Estimate and breakup of the financial request (specify if host will provide matching funds). Typical STSMs lasts between 1- 6 weeks. - A support letter from the Home Institution Applications should be made following this link: https://the-center-of-gravity.com/join-us/ We encourage all applicants to apply for funding or co-funding to visit the CoG with either their home institute, the Simons Collaborative Grant on Black Holes and Strong Gravity, or one of the following COST Actions CA23130, CA23115, CA22113, CA22113, CA21136. For the successful applicants, The Center of Gravity (and the AEI Astrophysical and Cosmological Relativity Department, if the visit is at the AEI) will cover economy-class flights, train, or bus tickets and provide hotel accommodation near the Institutes during part or for the full stay. Details will be provided upon acceptance. After the STSM, the grantee is required to submit a short scientific report (one page max). The report should contain the purpose of the STSM, a description of the work carried out during the STSM, a description of the main results and other comments (if any). Contact: Nils Siemonsen, nils.siemonsen[AT]nbi.ku.dk +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.17. Postdoctoral fellowships in gravitational physics and gravitational-wave astronomy, Baltimore, MD, USA ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=31546 Deadline: 2026-12-01 Location: Baltimore, MD, USA Additional Information: https://academicjobsonline.org/ajo?joblst---536-32881 Contact: berti[AT]jhu.edu The William H. Miller III Department of Physics and Astronomy at Johns Hopkins University invites applications for postdoctoral fellowships in the general area of gravitational physics and gravitational-wave astronomy. These fellowships offer the opportunity for postdoctoral research that combines academic freedom with strong faculty mentorship in an intellectually vibrant, inclusive, and welcoming department. The Department has strong programs in condensed-matter physics, particle physics, astrophysics, and biological physics and is embarking upon a significant expansion, including growth into new areas of physics. The department also benefits from its close relationship with the Space Telescope Science Institute, located on the Johns Hopkins campus. The candidates are expected to work in Emanuele Berti's research group (https://pages.jh.edu/eberti2/about/). The group currently includes about 10 postdocs, 5 Ph.D. students, and various undergraduate students supported in part by grants from the National Science Foundation and the Simons Foundation. The postdoctoral fellows are encouraged to collaborate within the recently established Simons Collaboration on Black Holes and Strong Gravity (https://simonscbhsg.com/). Typical starting salaries range between $63480 and $75000. A higher salary may be possible for exceptionally qualified candidates. The Department of Physics and Astronomy at Johns Hopkins University has a vibrant and interdisciplinary research environment, and the candidates are encouraged to interact with other faculty members, students and postdocs working in closely related research areas. More details about the department and its research can be found at https://physics-astronomy.jhu.edu . Consideration of applications will begin on 1 December 2026 and continue until all available positions are filled. Applicants should submit a curriculum vitae, a statement of research interests, and a list of publications, and arrange for at least three letters of reference on their behalf to be submitted to the application website. All qualified applicants will receive consideration without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ============================================== 3. News and Codes ============================================== 3.1. Topical Collection from Lemaitre Conference 2024 completed ------------------------------------------------------------ Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2026/09/15/topical-collection-from-lemai... Additional Information: https://link.springer.com/collections/fcfibbicbi Topical Collection "Black Holes, Gravitational Waves and Space-Time Singularities (Lemaitre Conference 2024)" - Complete collection of 19 articles now published 14 September 2026 The legacy of Georges Lemaitre - whose 1927 derivation of the recession of the nebulae and 1931 hypothesis of the primeval atom laid the conceptual foundations of the Big Bang paradigm - provides both a historical anchor and an enduring source of inspiration for the research presented in this collection arising from the Lemaitre Conference 2024 held at the Vatican Observatory in Castel Gandolfo, 17-21 June 2024. This conference was the second in a series of workshops dedicated to this legacy, following the inaugural meeting of 2017 (see the special issue in Found. Phys., vol. 48). The combination of formal talks, extended daily discussion, and the uniquely welcoming and intellectually stimulating atmosphere of the Vatican Observatory, proved exceptionally productive. Specialists in cutting-edge observation, theoretical physicists, and historians of science were able to develop a shared language and to identify the most pressing open challenges in astrophysics, cosmology, and quantum gravity. The present topical collection gathers contributions from the invited speakers, offering a representative survey of the current state of the field. All articles in this collection are free-to-read from 15 September to 15 November 2026. Start by reading the summarizing Editorial: Bianchi, M., Cacciatori, S.L., Galaverni, M. et al. Black holes, gravitational waves and space-time singularities (Lemaitre Conference 2024). Gen. Relativ. Gravit. 58, 108 (2026). https://doi.org/10.1007/s10714-026-03608-0 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++