Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1994-03-02
Phys.Rev.D50:2581-2594,1994
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
38 pages
Scientific paper
10.1103/PhysRevD.50.2581
Different proposals for the wave function of the universe are analyzed, with an emphasis on various forms of the tunneling proposal. The issues discussed include the equivalence of the Lorentzian path integral and outgoing-wave proposals, the definitions of the outgoing waves and of superspace boundaries, topology change and the corresponding modification of the Wheeler-DeWitt equation. Also discussed are the "generic" boundary conditions and the third quantization approach.
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