Gravitational Waves from the Early Universe

122:026 (Nordita, Stockholm)


Nordita, Stockholm

Axel Brandenburg (Nordita), Mark Hindmarsh, Tina Kahniashvili

Acknowledgements & preprint numbers

We'd be grateful if you acknoweldge Nordita in papers resulting from this program. Please email Axel if you want a preprint number ~8-24h before your arXiv submission, so you can list it under "reports" under metadata.


Nordita, Stockholm, Sweden


Gravitational waves promise a new window into the highest-energy events in the evolution of the universe. The recent LIGO/Virgo detections of gravitational waves from the mergers of binary black holes and binary neutron stars have ignited interest in the future direction of gravitational wave astronomy.

The space-based Laser Interferometer Satellite Antenna (LISA), due for launch in 2034, will enable direct detection of gravitational waves of frequencies around a milliHertz. This frequency range makes LISA sensitive to stochastic gravitational wave backgrounds produced by unknown physics operating in the early universe, including first-order phase transitions at the electroweak scale.

This Nordita program will bring scientists together to engage in an effort to characterize and detect sources contributing to the gravitational wave background from the early universe, and the implications for new physics at the TeV scale and beyond.

Preliminary Schedule

Week 1 (26.8 - 30.8): Inflation, cosmic strings, and probes of high-energy and gravitational physics.
Week 2 (2.9 - 6.9): Cosmological phase transitions, primordial turbulence and relic magnetic fields.
Week 3 (9.9 - 13.9): Data analysis for early Universe sources
Week 4 (16.9 - 20.9): Conference 


Nordita provides a limited number of rooms in the Stockholm apartment hotel BizApartments free of charge for accepted participants.

Please be aware that unfortunately, scammers sometimes approach participants claiming to be able to provide accommodation and asking for credit card details. Please do not give this information to them. For successful applicants, Nordita will be in touch via email regarding accommodation. If you are in any doubt about the legitimacy of an approach, please get in contact with the organisers.

Sponsored by:


  • Alastair Wickens
  • Alberto Roper Pol
  • Antoine Petiteau
  • Anton Vikaeus
  • Arthur Kosowsky
  • Asier Lopez-Eiguren
  • Axel Brandenburg
  • Benjamin Stefanek
  • Chiara Caprini
  • Chloe Gowling
  • Daniel Cutting
  • David Marsh
  • David Weir
  • Deyan Mihaylov
  • Djuna Croon
  • Dmitri Kharzeev
  • Emanuela Dimastrogiovanni
  • Eugene Lim
  • Fëanor Reuben Ares
  • Gianmassimo Tasinato
  • Günter Sigl
  • Igor Pikovski
  • Igor Rogachevskii
  • Jani Dahl
  • Jing Liu
  • Jonathan Braden
  • Jonathan Kozaczuk
  • Juan Garcia-Bellido
  • Jun'ichi Yokoyama
  • Kari Rummukainen
  • Karsten Jedamzik
  • Katarina Martinovic
  • Mairi Sakellariadou
  • Marek Lewicki
  • Mark Hindmarsh
  • Matteo Fasiello
  • Mauro Pieroni
  • Nathan Kleeorin
  • Nikolaos Karnesis
  • Oliver Gould
  • Pierre Auclair
  • Ramkishor Sharma
  • Ricardo Zambujal Ferreira
  • Robi Banerjee
  • Ruth Durrer
  • Ryusuke Jinno
  • Sayan Mandal
  • Stephan Huber
  • Stephan Rosswog
  • Tina Kahniashvili
  • Ville Vaskonen
  • Yun Jiang