A field theory characterization of interacting adiabatic particles in cosmology

Details A field theory characterization of interacting adiabatic particles in cosmology A field theory characterization of interacting adiabatic particles in cosmology

2008-06-08

arxiv.org/abs/0806.1332v1

Class.Quant.Grav.25:154014,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

20 pages, 2 figures. A contribution to the Proceedings of the International Workshop on Cosmology and Gravitation, Peyresq 12,

Scientific paper

10.1088/0264-9381/25/15/154014

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.

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