11 papers
Beyond the Daisy Chain: Running and the 3D EFT View of Supercooled Phase Transitions
Martin Christiansen, Eric Madge, Cristina Puchades-Ibáñez +2
Pulsar timing arrays have recently observed a stochastic gravitational wave background at nano-Hertz frequencies. This raises the question whether the signal can be of primordial o…
Opening the Window of Ultra-Light PBHs by Exorcising the Poltergeist
Yann Gouttenoire, Nicholas Leister, Pedro Schwaller
The hot Big Bang may have emerged from evaporation of primordial black holes (PBHs) lighter than g. Standard monochromatic treatments predict nearly simultaneous evaporation,…
Gravitational Waves from Black Hole Reheating: The Scalar-Induced Component
Yann Gouttenoire, Nicholas Leister, Pedro Schwaller
The reheating of the universe by the evaporation of light primordial black holes (PBHs) can leave a stochastic gravitational-wave (GW) background in the early Universe. In the mono…
Audible Axion Magnetogenesis: Linking Intergalactic Magnetic Fields and Gravitational Waves
Christopher Gerlach, Daniel Schmitt, Pedro Schwaller
Identifying dark matter candidates that simultaneously generate multiple observable cosmological signatures is a key goal in connecting particle physics with upcoming observations.…
Generalized neutrino isocurvature
Christopher Gerlach, Wolfram Ratzinger, Pedro Schwaller
Searches for neutrino isocurvature usually constrain a specific linear combination of isocurvature perturbations. In this work, we discuss realistic cosmological scenarios giving r…
Signatures of High-Frequency Gravitational Waves in Electromagnetic Cavities
Sebastian Schenk, Kristof Schmieden, Pedro Schwaller
Similar to axions, gravitational waves (GW) can induce oscillating electromagnetic fields inside electromagnetic cavities. We explore their experimental sensitivity to monochromati…