Interacting Quantum Field Theory in de Sitter Vacua
High Energy Physics - Theory
2009-11-07 v2 Astrophysics
General Relativity and Quantum Cosmology
Abstract
We discuss interacting quantum field theory in de Sitter space and argue that the Mottola-Allen vacuum ambiguity is an artifact of free field theory. The nature of the nonthermality of the MA-vacua is also clarified. We propose analyticity of correlation functions as a fundamental requirement of quantum field theory in curved spacetimes. In de Sitter space, this principle determines the vacuum unambiguously and facilitates the systematic development of perturbation theory.
Keywords
Cite
@article{arxiv.hep-th/0209159,
title = {Interacting Quantum Field Theory in de Sitter Vacua},
author = {Martin B. Einhorn and Finn Larsen},
journal= {arXiv preprint arXiv:hep-th/0209159},
year = {2009}
}
Comments
34 pages including 5 figures