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Dust reference frame in quantum cosmology
- Publication Year :
- 2011
-
Abstract
- We give a formulation of quantum cosmology with a pressureless dust and arbitrary additional matter fields. The system has the property that its Hamiltonian constraint is linear in the dust momentum. This feature provides a natural time gauge, leading to a physical hamiltonian that is not a square root. Quantization leads to Schr{\"o}dinger equation for which unitary evolution is directly linked to geodesic completeness. Our approach simplifies the analysis of both Wheeler-deWitt and loop quantum cosmology (LQC) models, and significantly broadens the applicability of the latter. This is demonstrated for arbitrary scalar field potential and cosmological constant in LQC.<br />Comment: 8 pages, iopart style + BibTex
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1108.1147
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/0264-9381/28/22/225014