Is Minisuperspace Quantum Gravity Reliable?
General Relativity and Quantum Cosmology
2007-05-23 v2
Abstract
We study a minisuperspace quantum cosmology for a 2+1 dimensional de Sitter universe and find the wave function both exactly and in WKB approximation. Then we extend the model to a canonically quantized field theory for quantum gravity, i.e., a midisuperspace, and obtain the wave functional of the resulting field theory in the saddle point approximation. It is shown that these two approaches yield different results.
Cite
@article{arxiv.gr-qc/0101108,
title = {Is Minisuperspace Quantum Gravity Reliable?},
author = {O. Saremi},
journal= {arXiv preprint arXiv:gr-qc/0101108},
year = {2007}
}