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Amplitudes, Strong-Field Gravity and Resummation, April 7-17 2026, Stockholm

Registration is now open for the Nordita Program on Amplitudes, Strong-Field Gravity and Resummation, to be held at Nordita (Stockholm, Sweden) from 7 to 17 April 2026.

The program is structured as follows:

Week 1 [April 7–10, 2026 (4 days)]: The PhD school will focus on foundations and tools for gravitational self-force, amplitudes, self-force EFT, resummation strategies and data analysis relevant to waveform modelling. Theoretical lectures will be complemented by hands-on programming sessions and dedicated tutorials.

Week 2 [April 13–17, 2026 (5 days)]: Workshop focused on uniting the weak-field (PM) and strong-field (GSF) approaches to the two-body problem, as well resummation strategies relevant for gravitational-wave phenomenology. Individual talks will be complemented by discussion sessions to promote cross-community interaction and constructive debates.

PhD School (7-10 April 2026)

Topics will include:

  1. Scattering amplitudes and the EFT approach to self-force.
    Lecturers: Nabha Shah (NBI) & Chia-Hsien Shen (Uppsala Univ. and NTU, Taiwan)
  2. Introduction to gravitational self-force theory.
    Lecturers: Leor Barack (Univ. of Southampton) and Barry Wardell (UCD)
  3. Introduction to Numerical Relativity, Resummation strategies and Data Analysis.
    Lecturer: Patricia Schmidt (Univ. of Birmingham)

Workshop (13-17 April 2026)

There is pressing need for high-precision models of gravitational waveforms from binary black hole mergers, driven by the increasing sensitivity of gravitational-wave detectors. The central theme of this program is how to leverage particle physics methods when calculating processes relevant to gravitational-wave phenomenology. In particular, the workshop focuses on uniting two key perturbative approaches — post-Minkowskian (PM) theory, effective for weak-field, widely separated systems, and gravitational self-force (GSF) theory, suited to extreme-mass-ratio systems in strong fields. Crucial to combining these tools is understanding the resummation of the perturbative series. We aim to bring together both experts and younger theorists from these communities, fostering new collaborations and combining our efforts to address the pressing questions at the interface between these fields.

Invited speakers: [* To be confirmed]

D. Akpinar (University of Edinburgh), L. Bohnenblust (Humboldt University), D. Bini* (IAC, Rome), A. Buonanno* (AEI, Potsdam), T. Damour* (IHES), J. Hoogeveen (Humboldt University), K. Lee (APCTP, Pohang), O. Long (AEI, Potsdam), J. Mathews (National University of Singapore), S. Mougiakakos (LUTH, Meudon), J. Parra-Martinez* (IHES), H. Pfeiffer (AEI, Potsdam), J. Plefka (Humboldt University), R. Porto (DESY), T. Rahnuma (APCTP, Pohang), P. Rettegno* (University of Turin), R. Russo (QMUL), J. Steinhoff (AEI, Potsdam), C-H. Shen (Uppsala University), M. van de Meent (NBI), A. Vaswani (University of Southampton), N. Warburton (UCD), Z. Zhou (Princeton).

Venue

The program will be hosted by Nordita in Stockholm (Sweden) from 7th – 17th April 2026.

Application/Registration

Due to limited space, registration will be moderated for both the PhD school and the workshop. You may apply to the PhD school only, the workshop only, or both. Registration to be considered for on-site participation will close on 31 January 2026; after this date, registrants will receive an on-site/remote participation confirmation from the organizers.

Remote participation: All talks will be livestreamed via Zoom, and recordings will be made available to registered participants who cannot attend in person.

Organizers

Lucile Cangemi — University of Edinburgh, United Kingdom
Paolo Di Vecchia — Nordita, Sweden
Riccardo Gonzo — Queen Mary University of London, United Kingdom
Chris Kavanagh — University College Dublin, Ireland
Adam Pound — University of Southampton, United Kingdom
Geraint Pratten — University of Birmingham, United Kingdom

Funding sources:

This workshop is partially supported by the UKRI/ERC grant GWModels.

Workshop Website

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European Einstein Toolkit Meeting, December 1-5 2025, online

The Einstein Toolkit is a community-driven software platform of core computational tools to advance and support research in relativistic astrophysics and gravitational physics.

The meeting is open to anyone interested in the Einstein Toolkit.

Program highlights:

  • Introductory lectures
  • Hands-on tutorials on the Einstein Toolkit
  • Research talks
  • Showcases from other numerical relativity codes
  • Friday discussion session : The Future of the Einstein Toolkit in Europe

Registration is moderated and remains open throughout the meeting, but early registration is encouraged.
Abstract submission deadline: 14 November 2025, 23:59 GMT.

Contact
Beyhan Karakaş, beyhannkarakas(at)gmail.com
Rahime Matur, r.matur(at)soton.ac.uk
Ian Hawke, i.hawke(at)soton.ac.uk

Dates & Time 1-5 December 2025, 10:00-17:30 (GMT)

Location – Zoom (link will be sent to participants)

Speakers
Steve Brandt, Louisiana State University
Katy Clough, Queen Mary University of London
Peter Diener, Louisiana State University
Tim Dietrich, Universitat Potsdam
Zachariah B. Etienne, University of Idaho
Deborah Ferguson, University of Rhode Island
Francois Foucart, University of New Hampshire
Philippe Grandclement, Observatoire de Paris
Carsten Gundlach, University of Southampton
Roland Haas, The University of British Columbia
Peter Hammond, Albert Einstein Institute
Ian Hawke, University of Southampton
Kota Hayashi, Albert Einstein Institute
Liwei Ji, Rochester Institute of Technology
Jay Kalinani, University of Illinois Urbana-Champaign
Toru Kojo, High Energy Accelerator Research Organization (KEK)
Steven Liebling, Long Island University
Brian D. Metzger, Columbia University
Philipp Moesta, University of Amsterdam
Carlos Palenzuela, Universitat de les Illes Balears
David Radice, The Pennsylvania State University
Stephan Rosswog, University of Hamburg
Lucas Timotheo Sanches, Louisiana State University
Erik Schnetter, Perimeter Institute for Theoretical Physics
Leo R. Werneck, University of Idaho
Helvi Witek, University of Illinois Urbana-Champaign

Organisers
Beyhan Karakaş, Independent Researcher
Rahime Matur, University of Southampton
Ian Hawke, University of Southampton

Workshop Website

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PhD Winter School on Gravitational Physics, January 25-30, 2026 in Norway

Upcoming PhD Winter School on Gravitational Physics which will take place at a ski resort in Norway Jan. 25th - Jan. 30th, 2026. The application deadline is December 20th, 2025.

The school is located at an absolutely wonderful place (Tron Hotel Skeikampen https://www.thonhotels.com/our-hotels/norway/skeikampen/), which offers fantastic skiing opportunities between the lectures! This PhD winter school has been running for many years, and is one of the top PhD schools in Europe.

For the upcoming school we have the exceptional pleasure of announcing that the main lectures will be given by:

  • Netta Engelhardt (MIT)
  • Luis Lehner (Perimeter Institute)
  • Isobel Romero-Shaw (Cardiff University)
  • Jan Plefka (Humboldt University)

The topics of lectures include theory and observations of gravitational waves, black holes and quantum information, strong gravity and horizons, and analytical approaches to black hole dynamics. On top of that, scientists affiliated with the Niels Bohr Institute will give topical lectures on current hot topics in gravitational physics.

Interested students should apply through this website before December 20th, 2025: https://indico.nbi.ku.dk/e/nordic-school-2026

Organizers: Johan Samsing, Poul H. Damgaard, Emil Bjerrum-Bohr

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APS Global Physics Summit, March 15-20 2026 in Denver and online

The joint March and April American Physical Society Meeting, known as the Global Physics Summit, will be held in Denver, CO, USA March 16-19, 2026. 

Contributed abstracts are invited at https://summit.aps.org/attend/abstracts/ , and are due October 23, 2025

Abstracts are particularly welcome on O4 results (noting that the abstracts will be public well in advance of March 2026), preparations for O5, and status of ongoing work. Sessions are anticipated on instrumentation, analysis, results, and much more!

Please recall that abstracts, presentations, and posters are subject to PnP policies, so circulation within working groups ASAP is recommended.

Meeting Website

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International LILA Meeting (2025 Lunar Gravitational-Wave Workshop), November 13-14 2025 at APL, Laurel, Maryland

The Johns Hopkins Applied Physics Laboratory (APL) and the Vanderbilt Lunar Labs Initiative cordially invite the scientific community to the International LILA Meeting (2025 Lunar Gravitational-Wave Workshop), to be held 13–14 November 2025 at APL, Laurel, Maryland, USA. This is the fifth annual meeting in the Lunar GW Workshop series, following Belle-Île-en-Mer (2024), Nashville (2023), Bern (2022) and Cascina (2021). The 2025 Lunar GW workshop will take place in Building 200 on APL’s South Campus.

This meeting continues community discussions on the Laser Interferometer Lunar Antenna (LILA) project – a proposed detector on the lunar surface to measure gravitational waves in the mid-band between ground-based detectors LIGO–Virgo–KAGRA and the future space mission LISA. The primary foci of this workshop will be on defining the science goals, instrument implementation, deployment timeline, and establishing the formal consortium structure for LILA. Sessions will include multi-messenger astrophysics, lunar geoscience, instrumentation, and technology development.

Scientific Organizing Committees

  • Karan Jani, Vanderbilt University (co-chair)
  • Jim Kinnison, Applied Physics Laboratory (co-chair)
  • James Trippe, Vanderbilt University (co-chair)
  • John Conklin, University of Florida
  • Stephen Eikenberry, University of Central Florida
  • Kris Izquierdo, Applied Physics Laboratory
  • Philippe Lognonné, Institut de Physique du Globe de Paris
  • Mark Panning, Jet Propulsion Laboratory
  • Volker Quetschke, University of Texas Rio-Grande Valley
  • Robert Reed, Vanderbilt University
  • Brett Shapiro, Applied Physics Laboratory
  • Joseph Silk, Johns Hopkins University

Workshop Website

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In Pursuit of Gravitational Waves: Solving the Two-Body Problem in General Relativity, Potsdam, October 20-22, 2025

The year 2025 offers a fitting moment to reflect on the development of one of the most profound problems in general relativity: the relativistic two-body problem. Just over fifty years ago, the discovery of the Hulse–Taylor pulsar provided the first observational evidence for gravitational radiation from binary systems. Since then, key contributions have marked decisive steps forward, leading to the first detection of gravitational waves in 2015 by the LIGO-VIRGO collaboration. As we commemorate ten years since that historic achievement, this progression of achievements not only traces a remarkable trajectory of scientific progress but also underscores the crucial interplay between analytical, numerical, and experimental communities in advancing our understanding of the two-body problem and its foundational role in gravitational-wave astronomy.

Against this backdrop, the Balzan Workshop In Pursuit of Gravitational Waves: Solving the Two-Body Problem in General Relativity, to be held from October 20 to 22, 2025, will bring together a select group of researchers who have played a central role in this history, alongside historians and philosophers of physics. The workshop offers an opportunity not only to revisit landmark developments, but also to reflect on the evolving methods, collaborations, and conceptual challenges that have shaped this remarkable scientific journey.

Hosted by the “Astrophysical and Cosmological Relativity” division at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute) in Potsdam, Germany, the Workshop is part of the Balzan Prize Project. This project investigates the historical and philosophical dimensions of solving the two-body problem in general relativity, with particular emphasis on the development of both analytical and numerical approaches, as well as the synergy—and at times, the dissonance—between these methods. The event will feature twelve talks that are historical, philosophical, and forward-looking in scope, along with three panel discussions centered on key themes:

• Why Did Progress in Analytical Relativity Differ in Europe Compared to the US, and More Generally Among Countries?
• Why Did the Progress in Numerical Relativity Differ in Europe Compared to the US, and More Generally Among Countries?
• Appreciation, Competition, and Synergism Between Analytical and Numerical Relativity Approaches

Contributions from experimentalists are also included, highlighting how theoretical modeling has both informed and responded to observational work.

The workshop is by invitation only. Each talk will be complemented by ample time for discussion, encouraging open and engaging exchanges across disciplinary boundaries.

Scientific organizing committee
Alexander Blum, Alessandra Buonanno, Félix-Louis Julié, Dennis Lehmkuhl, Jean-Philippe Martinez, Harald Pfeiffer, Christian Röken, and Jan Steinhoff.

Local organizing committee
Alessandra Buonanno, Félix-Louis Julié, Jean-Philippe Martinez, Harald Pfeiffer, and Jan Steinhoff.

Illustration and design
Ana Carvalho

Web development
Marco Gajardo

Administrative support
Brit Holland, Elke Müller

Workshop Website

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PhD school in Stavanger, November 24- December 5

The University of Stavanger is glad to announce the 2025 NPACT school (Stavanger, Nov. 24th - Dec. 5th).

This school is part of the activities of the Norwegian Particle, Astroparticle and Cosmology Theory (NPACT) network and is open to Ph.D. students and early-career scientists worldwide who wish to broaden their understanding of topics within the NPACT scope.

Lectures and speakers:

  • Dark matter — T. Bringman (U. of Oslo)
  • Thermal history of the universe — H. Kolesova (U. of Stavanger)
  • Cosmological phase transitions and thermal particle production — M. Laine (U. of Bern)
  • Physics of neutron stars — A. Kurkela (U. of Stavanger)
  • Mapping the theory space: Bayesian and frequentist global fit — A. Kvellestad (U. of Oslo)
  • Gravitational waves and data analysis — A. Nielsen (U. of Stavanger)
  • Effective field theories and applications in particle physics — A. E. Thomsen (U. of Bern)

Practical information:

No attendance fee is required.
The school provides free accommodation to a limited number of participants requesting financial support by Oct. 14th. Under similar circumstances, priority will be given to early applicants.

Participants enrolled in a Norwegian Ph.D. program can earn 5 or 10 ECTS credits. For non-Norwegian programs, the official ECTS accreditation must be assessed on a case-by-case basis.

For details and registration, see the school webpage

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GW-EM-Nu-2025: Multi-Messenger Science With Indian Facilities-Now and in the Next Decade, December 1-3 2025 at Tata Institute of Fundamental Research

This year marks the 10-years of discovery of Gravitational Waves, which has opened a new window for multi-messenger science. The era of multi-messenger science using signals from astrophysical sources observed in different cosmic messengers such as Cosmic Rays (CRs), Electromagnetic Waves (EW), Gravitational Waves (GW), and Neutrinos opens a new paradigm in understanding the physics governing the Universe over different length scales from the size of a nucleus to the size of the observable Universe. The success of this research frontier relies on the coordinated observation between different existing telescopes/observatories which are observing in different messengers and also on building the next generation telescopes/observatories that can jointly observe signals using different cosmic messengers in the coming years in the frequency range (or energy band) which are of scientific interests based on our theoretical understanding of these astrophysical sources.

This conference plans to bring researchers from India working in different areas–instrumentation and theory on the same platform to discuss (i) the requirements and challenges in coordinated observations with existing Indian facilities between different messengers, (ii) key areas of development of telescope facilities and theoretical predictions for enhancing the scientific outcome, (iii) the roadmap for joint observations using multiple telescopes, and (iv) plan for strategically important future telescopes/observatories which will enhance multi-messenger science from India.

Conference Website

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The School on Gravity: from motion to commotion, June 22-26 2026 at NBI Copenhagen

Understanding the gravitational interaction is one of the great scientific endeavors of the 21st century. The Nobel Prize-winning discovery of gravitational waves in 2015, and subsequent detections by the LIGO-Virgo-KAGRA Collaboration, have marked a revolutionary step forward in physics and astrophysics by opening an entirely new window for exploring the Universe. Future upgrades to these detectors, along with upcoming facilities such as LISA and the Einstein Telescope, promise even more breakthrough discoveries that the next generation of scientists will need to interpret.

The School on Gravity (22–26 June 2026, Copenhagen) will introduce junior scientists—graduate students and advanced undergraduates with a background in general relativity—to a wide range of foundational topics in the exciting new field of gravitational wave physics. Topics will span from the theory of motion, to new challenges introduced by quantum physics, to the astrophysics of black holes and source modeling for gravitational-wave detectors.

The School on Gravity will take place in the legendary Auditorium A of the Niels Bohr Institute, inviting students and lecturers to challenge current paradigms in gravitational physics in the spirit of the quantum revolution that unfolded in this very room.

The members of the Scientific Organizing Committee for the School of Gravity are Vitor Cardoso (Director of CoG), Emil Bjerrum-Bohr, Jose Ezquiaga, Troels Harmark, Niels Obers, Marta Orselli, Alessia Platania, Johan Samsing, Maarten van de Meent, Ziqi Yan.

The local organizing committee is composed of Vitor Cardoso and Jose Ezquiaga.

School Website

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School on Gravity, Niels Bohr Institute, June 22-26 2026

Understanding the gravitational interaction is one of the great scientific endeavors of the 21st century. The Nobel Prize-winning discovery of gravitational waves in 2015, and subsequent detections by the LIGO-Virgo-KAGRA Collaboration, have marked a revolutionary step forward in physics and astrophysics by opening an entirely new window for exploring the Universe. Future upgrades to these detectors, along with upcoming facilities such as LISA and the Einstein Telescope, promise even more breakthrough discoveries that the next generation of scientists will need to interpret.

The School on Gravity (22–26 June 2026, Copenhagen) will introduce junior scientists—graduate students and advanced undergraduates with a background in general relativity—to a wide range of foundational topics in the exciting new field of gravitational wave physics. Topics will span from the theory of motion, to new challenges introduced by quantum physics, to the astrophysics of black holes and source modeling for gravitational-wave detectors.

The program is as follows:

Lectures on Black Holes and Neutron Stars (how, when and where they are born, how they spin, how many, when do they merge, how many merge).
Lecturer: Lieke van Son (Radboud University)

Lectures on Motion (the two body problem in General Relativity).
Lecturer: Julio Parra Martinez (IHES)

Lectures on Completing Einstein (why does General Relativity need completion, what type of effects should we be on look out for, where would they manifest themselves).
Lecturer: Gustavo Turiaci (U. Washington, Seattle)

Lectures on Environments (which type of environments, how do they affect strong field gravity, how do we model them, impact on gravitational wave signals).
Lecturer: Laura Sberna (Nottingham University)

Please apply at: https://the-center-of-gravity.com/events/the-school-on-gravity-from-motion-to-commotion-2026/

We require submission of a single pdf file containing a two-page CV, up to half a page motivation letter, and a signed support letter from an advisor on letterhead.

Deadline: February 01, 2026.

The number of seats is limited, so we encourage you to apply as soon as possible.

The School on Gravity will take place in the legendary Auditorium A of the Niels Bohr Institute, inviting students and lecturers to challenge current paradigms in gravitational physics in the spirit of the quantum revolution that unfolded in this very room. This is the first of a series of annual school organized by the Center of Gravity (CoG).

The members of the Scientific Organizing Committee for the School of Gravity are Vitor Cardoso (Director of CoG), Emil Bjerrum-Bohr, Jose Ezquiaga, Troels Harmark, Niels Obers, Marta Orselli, Alessia Platania, Johan Samsing, Maarten van de Meent, Ziqi Yan.

Local Organizing Committee: Vitor Cardoso and Jose Ezquiaga

Contact: sog(at)the-center-of-gravity.com