Stress Tensor Fluctuations and Passive Quantum Gravity
General Relativity and Quantum Cosmology
2007-05-23 v2
Abstract
The quantum fluctuation of the stress tensor of a quantum field are discussed, as are the resulting spacetime metric fluctuations. Passive quantum gravity is an approximation in which gravity is not directly quantized, but fluctuations of the spacetime geometry are driven by stress tensor fluctuations. We discuss a decomposition of the stress tensor correlation function into three parts, and consider the physical implications of each part. The operational significance of metric fluctuations and the possible limits of validity of semiclassical gravity are discussed.
Cite
@article{arxiv.gr-qc/0102063,
title = {Stress Tensor Fluctuations and Passive Quantum Gravity},
author = {L. H. Ford and Chun-Hsien Wu},
journal= {arXiv preprint arXiv:gr-qc/0102063},
year = {2007}
}
Comments
13 pages. Based on a talk given at the 5th Peyresq workshop. Revised version incorporates corrections in several expressions in Sect. 5