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arXiv · 0806.1332

A field theory characterization of interacting adiabatic particles in cosmology

Daniel Arteaga
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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.

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Daniel Arteaga. 2008-06-08. A field theory characterization of interacting adiabatic particles in cosmology. https://doi.org/10.1088/0264-9381%2F25%2F15%2F154014

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