Energy-momentum tensor for scalar fields coupled to the dilaton in two dimensions
General Relativity and Quantum Cosmology
2009-10-31 v2 High Energy Physics - Theory
Abstract
We clarify some issues related to the evaluation of the mean value of the energy-momentum tensor for quantum scalar fields coupled to the dilaton field in two-dimensional gravity. Because of this coupling, the energy-momentum tensor for the matter is not conserved and therefore it is not determined by the trace anomaly. We discuss different approximations for the calculation of the energy-momentum tensor and show how to obtain the correct amount of Hawking radiation. We also compute cosmological particle creation and quantum corrections to the Newtonian potential.
Keywords
Cite
@article{arxiv.gr-qc/9808048,
title = {Energy-momentum tensor for scalar fields coupled to the dilaton in two dimensions},
author = {Fernando C. Lombardo and Francisco D. Mazzitelli and Jorge G. Russo},
journal= {arXiv preprint arXiv:gr-qc/9808048},
year = {2009}
}
Comments
18 pages, RevTex, no figures. Some changes have been added. To appear in Physical Review D