162 citations · 1.7k across the 40 of their papers we have counts for
5 papers · 1 filter
Mimicking alternatives to inflation with interacting spectator fields
Guillem Domènech, Javier Rubio, Julius Wons
It has been argued that oscillatory features from spectator fields in the primordial power spectrum could be a probe of alternatives to inflation. In this work, we soften this clai…
Gravitational waves from global cosmic strings in quintessential inflation
Dario Bettoni, Guillem Domènech, Javier Rubio
The combination of non-minimal couplings to gravity with the post-inflationary kinetic-dominated era typically appearing in quintessential inflation scenarios may lead to the spont…
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…
Vector disformal transformation of generalized Proca theory
Guillem Domènech, Shinji Mukohyama, Ryo Namba +1
Motivated by the GW170817/GRB170817A constraint on the deviation of the speed of gravitational waves from that of photons, we study disformal transformations of the metric in the c…
Doppelgänger dark energy: modified gravity with non-universal couplings after GW170817
Luca Amendola, Dario Bettoni, Guillem Domènech +1
Gravitational Wave (GW) astronomy severely narrowed down the theoretical space for scalar-tensor theories. We propose a new class of attractor models for Horndeski action in which…