3 papers
gr-qc2025
Acoustic gravitational waves beyond leading order in bubble over Hubble radius
Lorenzo Giombi, Jani Dahl, Mark Hindmarsh
We calculate the gravitational wave power spectrum from sound waves in a cosmological first order phase transition in the unexplored regime of large bubbles, by which we mean that…
gr-qc2024
Signatures of the speed of sound on the gravitational wave power spectrum from sound waves
Lorenzo Giombi, Jani Dahl, Mark Hindmarsh
Future space-based interferometers offer an unprecedented opportunity to detect signals from the stochastic gravitational wave background originating from a first-order phase trans…
astro-ph.CO2023
General relativistic bubble growth in cosmological phase transitions
Lorenzo Giombi, Mark Hindmarsh
We use a full general relativistic framework to study the self-similar expansion of bubbles of the stable phase into a flat Friedmann-Lemaître-Robertson-Walker Universe in a first…