A field theory characterization of interacting adiabatic particles in cosmology
General Relativity and Quantum Cosmology
2008-11-26 v1 High Energy Physics - Phenomenology
Abstract
We explore the adiabatic particle excitations of an interacting field in a cosmological background. By following the time-evolution of the quantum state corresponding to the particle excitation, we show how the basic properties characterizing the particle propagation can be recovered from the two-point propagators. As an application, we study the background-induced dissipative effects on the propagation of a two-level atom in an expanding universe.
Cite
@article{arxiv.0806.1332,
title = {A field theory characterization of interacting adiabatic particles in cosmology},
author = {Daniel Arteaga},
journal= {arXiv preprint arXiv:0806.1332},
year = {2008}
}
Comments
20 pages, 2 figures. A contribution to the Proceedings of the International Workshop on Cosmology and Gravitation, Peyresq 12, June 16-22, 2007, Peyresq, France. Accepted for publication in Clas. Quant. Grav