4 papers
Vacuum birefringence and the Schwinger effect in (3+1) de Sitter
Mariona Banyeres, Guillem Domènech, Jaume Garriga
In de Sitter space, the current induced by an electric field in vacuum is known to feature certain peculiarities, such as infrared hyperconductivity for light bosons in weak electr…
Halo Formation from Yukawa Forces in the Very Early Universe
Guillem Domènech, Derek Inman, Alexander Kusenko +1
If long-range attractive forces exist and are stronger than gravity then cosmic halo formation can begin in the radiation-dominated era. We study a simple realization of this effec…
Gravitational wave constraints on the primordial black hole dominated early universe
Guillem Domènech, Chunshan Lin, Misao Sasaki
We calculate the gravitational waves (GWs) induced by the density fluctuations due to inhomogeneous distribution of primordial black holes (PBHs) in the case where PBHs eventually…
Gravitational waves induced by scalar-tensor mixing
Pritha Bari, Nicola Bartolo, Guillem Domènech +1
This paper explores the physics of second-order gravitational waves (GWs) induced by scalar-tensor perturbation interactions in the radiation-dominated Universe. We investigate the…