162 citations · 1.7k across the 40 of their papers we have counts for
6 papers · 1 filter
Scalar-induced gravitational wave interpretation of PTA data: the role of scalar fluctuation propagation speed
Shyam Balaji, Guillem Domènech, Gabriele Franciolini
Pulsar timing arrays gathered evidence of the presence of a gravitational wave background around nHz frequencies. If the gravitational wave background was induced by large and Gaus…
Lectures on Gravitational Wave Signatures of Primordial Black Holes
Guillem Domènech
We provide a pedagogical approach to gravitational waves in cosmology with focus on gravitational wave signals related to primordial black holes. These lectures notes contain more…
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…
Disformal symmetry in the Universe: mimetic gravity and beyond
Guillem Domènech, Alexander Ganz
Symmetries play an important role in fundamental physics. In gravity and field theories, particular attention has been paid to Weyl (or conformal) symmetry. However, once the theor…
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 hints black hole remnants as dark matter
Guillem Domènech, Misao Sasaki
The end state of Hawking evaporation of a black hole is uncertain. Some candidate quantum gravity theories, such as loop quantum gravity and asymptotic safe gravity, hint towards P…