Welcome and introductory remarks Room: 122:026

Gravitational wave energy budget in strongly supercooled phase transitions

• Marek Lewicki

Room: 122:026 We derive efficiency factors for the production of gravitational waves through bubble collisions and plasma-related sources in strong phase transitions, and find the conditions under which the bubble collisions can contribute significantly to the signal. We illustrate our findings in two examples, the Standard Model with an extra $|H|^6$ interaction and a classically scale-invariant $U(1)_{\rm B-L}$ extension of the Standard Model. The contribution to the GW spectrum from bubble collisions is found to be negligible in the $|H|^6$ model, whereas it can play an important role in parts of the parameter space in the scale-invariant $U(1)_{\rm B-L}$ model. In both cases the sound-wave period is much shorter than a Hubble time, suggesting a significant amplification of the turbulence-sourced signal. We find, however, that the peak of the plasma-sourced spectrum is still produced by sound waves with the slower-falling turbulence contribution becoming important off-peak.

Registration Room: 122:026

Gravitational wave spectra from primordial magnetohydrodynamic turbulence

• Alberto Roper Pol (University of Colorado. LASP)

Room: 122:026

A Real-Time Picture of False Vacuum Decay Room: 122:026

TBC Room: 122:026

Wine & cheese, BBQ, Welcome from Nordita director Niels Obers Room: 122:026

Latest observational signatures of cosmic strings: Gravitational waves and particle emission

• Pierre Auclair (APC)

Room: 122:026

Nordita Astrophysics Seminar Room: 122:026 https://agenda.albanova.se/conferenceDisplay.py?confId=6809

Gravitational wave generation in a viable scenario of inflationary magnetogenesis

• Ramkishor Sharma (University of Delhi)

Room: 122:026

Formation and evolution of primordial black hole binaries

• Ville Vaskonen (Kings College, London)

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No talk Room: 122:026

Gravitational Waves: The stochastic background and its anisotropies.

• Mairi Sakellariadou (King's College London)

Room: 122:026

Stochastic gravitational waves from preheating

• Jing Liu (Institute of Theoretical Physics, Chinese Academy of Sciences)

Room: 122:026

Nonperturbative analysis of the electroweak phase transition and its gravitational wave signal

• Oliver Gould (Helsinki University)

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BBQ Room: 122:026

Gravitational waves from first-order phase transitions: ultra-supercooled transitions and the fate of relativistic shocks

• Ryusuke Jinno (DESY)

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Bubble wall velocities in first-order phase transitions

• Stephan Huber (University of Sussex)

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Sound shell model of acoustic gravitational wave production

• Mark Hindmarsh (University of Sussex)

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Nordita talk and social event Room: 122:026

Phase transitions in BSM models and numerical simulations

• Kari Rummukainen (University of Oulu)

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Contributions of MHD turbulence to primordial gravitational wave production

• Guenter Sigl (University of Hamburg)

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Gravitational wave detection with atomic clocks

• Igor Pikovski (University of Stockholm)

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Chiral effects as the source of MHD turbulence and large-scale magnetic field

• Igor Rogachevskii (Ben-Gurion University of the Negev)

Room: 122:026

Strong first-order phase transitions: Vorticity, droplets and gravitational waves

• Daniel Cutting (University of Sussex)

Room: 122:026

Observing the Gravitational Universe with the LISA

• Antoine Petiteau (Laboratoire APC)

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Inflationary magnetogenesis and the gravitational wave signal

• Sayan Mandal (Carnegie Mellon University)

Room: 122:026

Welcome, registration and introduction Room: 122:026

Gravitational Waves: The stochastic background and its anisotropies

• Mairi Sakellariadou (King's College London)

Room: 122:026

Gravitational waves as a probe of the history of the universe

• Jun'ichi Yokoyama (RESCEU, University of Tokyo)

Room: 122:026

Constraining gravitational waves from inflation

• Emanuela Dimastrogiovanni (University of Sydney)

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Gravitational wave production from Inflaton Collapse/A stringent limit on primordial magnetic fields from the CMB

• Karsten Jedamzik

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Wine & cheese Room: 122:026

GW and LSS signatures of PBH as Dark Matter

• Juan Garcia-Bellido

Room: 122:026

Probing the Inflationary Field Content with Primordial Gravitational Waves

• Matteo Fasiello (ICG Portsmouth)

Room: 122:026

Coherent Gravitational waves from cosmic strings

• Eugene Lim (Kings College, London)

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Discussion session Room: 122:026

Gravitational waves from the sound of a phase transition

• Mark Hindmarsh (University of Sussex)

Room: 122:026

Simulating a strongly first-order thermal phase transition

• David Weir (University of Helsinki)

Room: 122:026

Primordial turbulent sources for gravitational waves

• Tina Kahniashvili (Carnegie Mellon University (USA) & Ilia State University (Georgia))

Room: 122:026

Numerical simulations of gravitational waves from early universe turbulence

• Alberto Roper Pol (University of Colorado. LASP)

Room: 122:026

Gravitational wave evolution from acoustic and vortical sources

• Axel Brandenburg (Nordita)

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Discussion session Room: 122:026

Pizza! Room: 122:026

Early confinement and gravitational waves

• Djuna Croon (TRIUMF)

Room: 122:026

Thermal resummation and the electroweak phase transition

• Yun Jiang (MPIK Heidelberg)

Room: 122:026

Low-frequency gravitational wave detection with astrometric data

• Deyan Mihaylov (Albert Einstein Institute, Potsdam)

Room: 122:026

Probing the Physics of the Early Universe with Gravitational Wave Interferometers

• Gianmassimo Tasinato (University of Swansea)

Room: 122:026

Colloquium: Baryons, dark matter and black holes: a common origin

• Juan Garcia-Bellido (IFT, Autonoma de Madrid)

Room: AlbaNova F4 Twenty-three years ago, we predicted that massive primordial black holes (PBH) would form via the gravitational collapse of radiation and matter associated with high peaks in the spectrum of curvature fluctuations, and that they could constitute all of the dark matter (DM) today. In 2015, we predicted the clustering and broad mass distribution of PBH, which peaks at several Msun, and whose high-mass tails could be responsible for the seeds of all galaxies. Since then, AdvLIGO-Virgo interferometers have detected gravitational waves from at least thirty merger events of very massive and spinless black hole binaries, and we propose that they are PBH. We have recently understood that a universal mechanism associated with rapid changes in the number of relativistic species in the early universe could have been responsible for the formation of PBH at specific scales and thus have a very concrete prediction for the mass spectrum of DM-PBH, with broad peaks at 10^{-5}, 1, 100, and 10^6 Msun. In particular, the QCD quark-hadron transition could be responsible for the efficient production of baryons over antibaryons at PBH collapse, thus explaining the presence of baryons today and the relative abundance of DM. We predict that within a few months a less than one solar mass PBH will be detected by AdvLIGO-Virgo, and that in a few years an array of GW detectors could be used to determine the mass and spin distribution of PBH dark matter with 10% accuracy. Thus, gravitational wave astronomy could be responsible for a new paradigm shift in the understanding of the nature of dark matter and galaxy formation.

Discussion session Room: 122:026