On the Unruh effect in de Sitter space
General Relativity and Quantum Cosmology
2011-09-23 v2
Abstract
We give an interpretation of the temperature in de Sitter universe in terms of a dynamical Unruh effect associated with the Hubble sphere. As with the quantum noise perceived by a uniformly accelerated observer in static space-times, observers endowed with a proper motion can in principle detect the effect. In particular, we study a "Kodama observer" as a two-field Unruh detector for which we show the effect is approximately thermal. We also estimate the back-reaction of the emitted radiation and find trajectories associated with the Kodama vector fields are stable.
Keywords
Cite
@article{arxiv.1011.3336,
title = {On the Unruh effect in de Sitter space},
author = {R. Casadio and S. Chiodini and A. Orlandi and G. Acquaviva and R. Di Criscienzo and L. Vanzo},
journal= {arXiv preprint arXiv:1011.3336},
year = {2011}
}
Comments
8 pages; corrected typos; sections structure revised