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Tunneling in perfect-fluid (minisuperspace) quantum cosmology

J. David Brown

  • Institute of Field Physics, Department of Physics and Astronomy, CB No. 3255, Phillips Hall, The University of North Carolina, Chapel Hill, North Carolina 27599

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Phys. Rev. D 41, 1125 – Published 15 February, 1990

DOI: https://doi.org/10.1103/PhysRevD.41.1125

Abstract

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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References (40)

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Phys. Rev. D 41, 1125– Published 15 February, 1990
  • Received 10 October 1989

© 1990 American Physical Society

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