Semiclassical Limit and Time in Quantum Cosmology

Details Semiclassical Limit and Time in Quantum Cosmology Semiclassical Limit and Time in Quantum Cosmology

1999-07-08

arxiv.org/abs/gr-qc/9907031v2

J.KoreanPhys.Soc.36:241-244,2000

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

RevTex, 7 pages, no figures; the methodology is clarified and references added

Scientific paper

We propose a method to recover the time variable and the classical evolution of the Universe from the minisuperspace wave function of the Wheeler-DeWitt equation. Defining a Hamilton-Jacobi characteristic function $W$ as the imaginary part of the $\ln \Psi$ we can recover the classical solution, and quantum corrections. The key idea is to let the energy of the Wheeler-DeWitt equation vanish only after the semiclassical limit is taken.

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