Quantum Cosmology for Tunneling Universes

Details Quantum Cosmology for Tunneling Universes Quantum Cosmology for Tunneling Universes

2004-03-03

arxiv.org/abs/gr-qc/0403015v1

J.Korean Phys.Soc. 45 (2004) S172-S180

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

RevTex4; invited talk at VI APCTP International Conference of Gravitation and Astrophysics (ICGA6), Seoul, Oct. 6-9, 2003

Scientific paper

In a quantum cosmological model consisting of a Euclidean region and a Lorentzian region, Hartle-Hawking's no-bounary wave function, and Linde's wave function and Vilenkin's tunneling wave function are briefly described and compared with each other. We put a particular emphasis on semiclassical gravity from quantum cosmology and compare it with the conventional quantum field theory in curved spacetimes. Finally, we discuss the recent debate on catastrophic particle production in the tunneling universe between Rubakov and Vilenkin within the semiclassical gravity.

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