http://arxiv.org/abs/2104.10936
Scalar modes are considered for the propagation of gravitational waves in cosmological background taking into account of thermal radiation and near cosmological singularities. In particular, we point out that the contribution of thermal radiation can heavily affect the dynamics of gravitational waves giving enhancement or dissipation effects both at quantum and classical level. These effects are considered both in General Relativity and in modified theories like $F(R)$ gravity. The possible detection and the disentanglement of the various gravitational modes on the stochastic background are also discussed.
S. Capozziello, S. Nojiri and S. Odintsov
Fri, 23 Apr 2021
33/48
Comments: 20 pages