The Role of Time in Physical Cosmology

Details The Role of Time in Physical Cosmology The Role of Time in Physical Cosmology

1995-10-10

arxiv.org/abs/astro-ph/9510059v1

Astronomy and Astrophysics

Astrophysics

8 pages, self-unpacking, uuencoded, gz-compressed postscript file, in Proceedings of the Sixth Quantum Gravity Seminar, Moscow

Scientific paper

Recent advances in observational cosmology are changing the way we view the nature of time. In general relativity, the freedom in choosing a time hypersurface has hampered the implementation of the theory. Fortunately, Hamilton-Jacobi theory enables one to describe all time hypersurfaces on an equal footing. Using an expansion in powers of the spatial curvature, one may solve for the wavefunctional in a semiclassical approximation. In this way, one may readily compare predictions of various inflation models with observations of microwave background anisotropies and galaxy clustering.

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