532 citations · 1.3k across the 26 of their papers we have counts for
5 papers · 1 filter
Did NANOGrav see a signal from primordial black hole formation?
Ville Vaskonen, Hardi Veermäe
We show that the recent NANOGrav result can be interpreted as a stochastic gravitational wave signal associated to formation of primordial black holes from high-amplitude curvature…
Updated predictions for gravitational waves produced in a strongly supercooled phase transition
John Ellis, Marek Lewicki, Ville Vaskonen
We update predictions for the gravitational wave (GW) signal from a strongly supercooled phase transition in an illustrative classically conformal U(1) model. We implement…
The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
Rouzbeh Allahverdi, Mustafa A. Amin, Asher Berlin +23
It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. W…
Detecting circular polarisation in the stochastic gravitational-wave background from a first-order cosmological phase transition
John Ellis, Malcolm Fairbairn, Marek Lewicki +2
We discuss the observability of circular polarisation of the stochastic gravitational-wave background (SGWB) generated by helical turbulence following a first-order cosmological ph…
Probes of Gravitational Waves with Atom Interferometers
John Ellis, Ville Vaskonen
Atom interferometers (AIs) on earth and in space offer good capabilities for measuring gravitational waves (GWs) in the mid-frequency deciHz band, complementing the sensitivities o…