Classical Spacetime from Quantum Gravity
General Relativity and Quantum Cosmology
2009-10-28 v2
Abstract
We show how classical spacetime emerges from quantum gravity through the study of a quantum FRW cosmological model coupled to a free massive scalar field using a new asymptotic expansion method of the Wheeler-DeWitt equation. It is shown that the coherent states of the nonadiabatic basis of a particular generalized invariant give rise to the quantum back reaction of matter field proportional to classical energy and the Einstein-Hamilton-Jacobi with matter becomes equivalent to the classical Einstein equation.
Cite
@article{arxiv.gr-qc/9601049,
title = {Classical Spacetime from Quantum Gravity},
author = {Sang Pyo Kim},
journal= {arXiv preprint arXiv:gr-qc/9601049},
year = {2009}
}
Comments
10 pages, ReVTeX, No Figures