Gravitational Waves meet Amplitudes in the Southern Hemisphere

August 14 – September 1, 2023

ICTP-SAIFR, São Paulo, Brazil

Principia Institute


The central theme of the program will be the application of particle physics methods to the calculation of processes relevant to gravitational-wave phenomenology.

We intend to bring together both experts and younger theorists from three distinct communities:

– Classical General Relativity, including both analytic and numerical approaches;

– Effective Field Theories;

– Scattering Amplitudes.

We also want to bring theorists into contact with observers and analysis specialists from LIGO-Virgo-KAGRA.

We intend to have one talk a day, with lots of time available for informal discussions and collaboration. The building hosting the program is brand new with comfortable discussion areas, right next to the intended hotel in the tourist center of São Paulo. We hope to have fifteen to twenty people in residence each week.

This activity will be preceded by the School on Modern Amplitude Methods for Gauge and Gravity Theories. Selected students attending the school have the option of remaining as observers.

There is no registration fee.


Click HERE for online registration

Registration deadline: July 2, 2023


  • Fernando Febres Cordero (Florida State University, USA)
  • David Kosower (Université Paris–Saclay, France)
  • Patricia Schmidt (University of Birmingham, UK)
  • Riccardo Sturani (ICTP-SAIFR/IFT-UNESP, Brazil)

Confirmed Invited Participants

  • Fabian Bautista (IPhT Saclay, France)
  • Collin Capano (UMass at Dartmouth, USA)
  • Leonardo de la Cruz (IPhT Saclay, France)
  • Stefano Foffa (University of Geneva, Switzerland)
  • Riccardo Gonzo (University of Edinburgh, UK)
  • Alfredo Guevara (Harvard University, USA )
  • Maria Haney (NIKHEF – Amsterdam, the Netherlands)
  • Manfred Kraus (Mexico University, Mexico)
  • Luis Lehner (Perimeter Institute, Canada)
  • Oliver Long (Max Planck Institute-Potsdam, Germany)
  • Raissa Mendes (UFF, Brazil)
  • Guilherme Pimentel (Scuola Normale Superiore – Pisa, Italy)
  • Adam Pound (University of Southampton, UK)
  • Justin Vines (MPI for Gravitational Physics, Germany)
  • Mao Zeng (University of Edinburgh, UK)
  • Aaron Zimermann (University of Texas – Austin, USA)



Click HERE for online registration

Registration deadline: July 2, 2023



Videos and Files

Additional Information

BOARDING PASS: All participants, whose travel has been provided or will be reimbursed by ICTP-SAIFR, should bring the boarding pass  upon registration. The return boarding pass (PDF, if online check-in, scan or picture, if physical) should be sent to by e-mail.

COVID-19: Fully vaccinated Brazilians and foreigners are required to present proof of vaccination, printed or electronically before boarding an international flight. Not vaccinated and not fully vaccinated passengers have to present a medical certificate with a negative test result before entering the country. Tests should be taken up to 24 hours before boarding.

Visa information: Nationals from several countries in Latin America and Europe are exempt from tourist visa. Nationals from Australia, Canada, Japan and USA are exempt from tourist visa until October 1st, 2023. Please check here which nationals need a tourist visa to enter Brazil.

Hotel recommendation: Participants and Speakers whose accommodation will be provided by the institute will stay at The Universe Flat.

How to reach the Principia Institute: The workshop will be held at Principia Institute of the Institute for Theoretical Physics Foundation, located at Rua Pamplona, 145,  50 meters away from the hotel Universe Flat.