116 citations · 540 across the 21 of their papers we have counts for
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astro-ph.CO2021★ 28 cited
Gravitational Waves from an Axion-Dark Photon System: A Lattice Study
Wolfram Ratzinger, Pedro Schwaller, Ben A. Stefanek
In this work, we present a lattice study of an axion - dark photon system in the early Universe and show that the stochastic gravitational wave (GW) background produced by this sys…
astro-ph.CO2020★ 90 cited
Whispers from the dark side: Confronting light new physics with NANOGrav data
Wolfram Ratzinger, Pedro Schwaller
The NANOGrav collaboration has recently observed first evidence of a gravitational wave background (GWB) in pulsar timing data. Here we explore the possibility that this GWB is due…