Phys. Rev. D 52, 1963–1969 (1995)Extrinsic time in quantum cosmologyReceived 13 February 1995; published in the issue dated 15 August 1995 Extrinsic time is identified in most isotropic and homogeneous cosmological models by matching it with the ideal clock—a parametrized system whose only ‘‘degree of freedom’’ is time. Once this matching is established, the cosmological models are quantized in the same way as the ideal clock. The space of solutions of the Wheeler-DeWitt equation is turned into a Hilbert space by inserting a time-dependent operator in the inner product, yielding a unitary theory equivalent to the phase-space-reduced theory. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.52.1963
DOI:
10.1103/PhysRevD.52.1963
PACS:
98.80.Hw, 04.20.Cv
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.