106 citations · 870 across the 18 of their papers we have counts for
4 papers · 1 filter
Constant-Roll (Quasi-)Linear Inflation
Alexandros Karam, Luca Marzola, Thomas Pappas +2
In constant-roll inflation, the scalar field that drives the accelerated expansion of the Universe is rolling down its potential at a constant rate. Within this framework, we highl…
Schwarzschild-de Sitter spacetime: the role of Temperature in the emission of Hawking radiation
Thomas Pappas, Panagiota Kanti
We consider a Schwarzschild-de Sitter (SdS) black hole, and focus on the emission of massless scalar fields either minimally or non-minimally coupled to gravity. We use six differe…
Frame-dependence of higher-order inflationary observables in scalar-tensor theories
Alexandros Karam, Thomas Pappas, Kyriakos Tamvakis
In the context of scalar-tensor theories of gravity we compute the third-order corrected spectral indices in the slow-roll approximation. The calculation is carried out by employin…
Effective Temperatures and Radiation Spectra for a Higher-Dimensional Schwarzschild-de-Sitter Black-Hole
Panagiota Kanti, Thomas Pappas
The absence of a true thermodynamical equilibrium for an observer located in the causal area of a Schwarzschild-de Sitter spacetime has repeatedly raised the question of the correc…