3 papers
gr-qc2025
Gravitational-wave dispersion over inhomogeneous space-times: General relativity, screened theories of gravity and non-minimal dark energy
Nicola Menadeo, Serena Giardino, Miguel Zumalacárregui
Gravitational waves (GWs) are direct probes of cosmological gravity, sensitive to space-time inhomogeneities along their propagation. The presence of massive objects breaks homogen…
gr-qc2025
To bounce or not to bounce in generalized Proca theory and beyond
Lara Bohnenblust, Serena Giardino, Lavinia Heisenberg +1
It is notoriously difficult to construct a stable non-singular bouncing cosmology that avoids all possible instabilities throughout the entire evolution of the universe. In this wo…
gr-qc2024
First-order thermodynamics of Horndeski cosmology
Marcello Miranda, Serena Giardino, Andrea Giusti +1
We delve into the first-order thermodynamics of Horndeski gravity, focusing on spatially flat, homogeneous, and isotropic cosmologies. Our exploration begins with a comprehensive r…