The Isaacson expansion in quantum cosmology
arXiv:gr-qc/9303016 · doi:10.1103/PhysRevD.48.1700
Abstract
This paper is an application of the ideas of the Born-Oppenheimer (or slow/fast) approximation in molecular physics and of the Isaacson (or short-wave) approximation in classical gravity to the canonical quantization of a perturbed minisuperspace model of the kind examined by Halliwell and Hawking. Its aim is the clarification of the role of the semiclassical approximation and the backreaction in such a model. Approximate solutions of the quantum model are constructed which are not semiclassical, and semiclassical solutions in which the quantum perturbations are highly excited.
Revtex, 11 journal or 24 preprint pages. REPLACEMENT: A comment on previous work by Dowker and Laflamme is corrected. Utah preprint UU-REL-93/3/10
References in corpus (1)
Cited by in corpus (6)
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- Classical Spacetime from Quantum Gravity
- Unitarity Condition on Quantum Fields in Semiclassical Gravity