Addressing the issue of nonunitarity in anisotropic quantum cosmology
Abstract
In the present work we show that the widely believed pathology of the nonunitarity of anisotropic quantum cosmological models cannot be a generic problem. We exhibit a nontrivial example, a Bianchi-I model with an ultrarelativistic fluid, that has a well-behaved time independent norm. We also show that a suitable operator ordering should produce time independent norms for the wave packets in the case of other more realistic fluids as well.
- Publication:
-
Physical Review D
- Pub Date:
- November 2014
- DOI:
- 10.1103/PhysRevD.90.104001
- arXiv:
- arXiv:1410.2718
- Bibcode:
- 2014PhRvD..90j4001P
- Keywords:
-
- 04.60.-m;
- 04.60.Gw;
- Quantum gravity;
- Covariant and sum-over-histories quantization;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Theory
- E-Print:
- 6 two column pages, no figure, accepted for publication in Physical Review D