Renormalized Stress Tensor for trans-Planckian Cosmology
General Relativity and Quantum Cosmology
2007-05-23 v2 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
Finite expressions for the mean value of the stress tensor corresponding to a scalar field with a generalized dispersion relation in a Friedman--Robertson--Walker universe are obtained using adiabatic renormalization. Formally divergent integrals are evaluated by means of dimensional regularization. The renormalization procedure is shown to be equivalent to a redefinition of the cosmological constant and the Newton constant in the semiclassical Einstein equations.
Keywords
Cite
@article{arxiv.gr-qc/0511046,
title = {Renormalized Stress Tensor for trans-Planckian Cosmology},
author = {D. Lopez Nacir and F. D. Mazzitelli and C. Simeone},
journal= {arXiv preprint arXiv:gr-qc/0511046},
year = {2007}
}
Comments
14 pages. Minor changes; version published in Physical Review D