Real or Imaginary? (On pair creation in de Sitter space)
High Energy Physics - Theory
2015-05-14 v6 General Relativity and Quantum Cosmology
Abstract
Using properly defined Feynman propagator we obtain non--zero imaginary contribution to the scalar field effective action in even dimensional de Sitter space. Such a propagator follows from the path integral in de Sitter space and obeys composition principle proposed in arXiv:0709.2899. The obtained expression for the effective action shows particle production with the Gibbons--Hawking rate.
Cite
@article{arxiv.0909.3722,
title = {Real or Imaginary? (On pair creation in de Sitter space)},
author = {Emil T. Akhmedov},
journal= {arXiv preprint arXiv:0909.3722},
year = {2015}
}
Comments
6 pages, Final version to appear in MPLA