Tunneling in perfect-fluid (minisuperspace) quantum cosmology

Details Tunneling in perfect-fluid (minisuperspace) quantum cosmology Tunneling in perfect-fluid (minisuperspace) quantum cosmology

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phrvd..41.1125b&link_type=abstract

Physical Review D (Particles and Fields), Volume 41, Issue 4, 15 February 1990, pp.1125-1141

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7

Semiclassical Theories And Applications, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

A minisuperspace model of general relativity with a positive cosmological constant coupled to a perfect isentropic fluid is presented. The classical equations of motion are solved for a tunneling solution that consists of a Euclidean instanton of the wormhole type, connected to Lorentzian Robertson-Walker universes. The path integral is then defined as a sum over Lorentzian geometries and it is shown that the tunneling solution dominates the semiclassical evaluation of the path integral.

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