Thermo field dynamics approach for entropy of spacetime
General Relativity and Quantum Cosmology
2015-11-03 v5
Abstract
A thermo field dynamics approach for calculating the entropy of a spacetime is suggested. It is exemplified through the Rindler spacetime, the Milne spacetime, the Boulware spacetime, and the Minkowski spacetime with a moving mirror that the entropy of a spacetime is equal to the entropy of a thermo quantum field with the same temperature of the spacetime we study. This in fact suggests an thermo field dynamics approach of calculating the entropy of a spacetime. In this approach, the entropy of a spacetime is an expectation value of the entropy operator on a thermo vacuum state. The thermo vacuum state is the vacuum state on the maximal manifold which is the maximal analytic extension of the spacetime we study.
Keywords
Cite
@article{arxiv.1506.06982,
title = {Thermo field dynamics approach for entropy of spacetime},
author = {Yu-Zhu Chen and Wen-Du Li and Wu-Sheng Dai},
journal= {arXiv preprint arXiv:1506.06982},
year = {2015}
}