Tunneling in perfect-fluid (minisuperspace) quantum cosmology

Journal Article · Thu Feb 15 00:00:00 EST 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.41.1125· OSTI ID:6917224

Brown, J D ^[1]

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1. Institute of Field Physics, Department of Physics Department of Astronomy, CB No. 3255, Phillips Hall, The University of North Carolina, Chapel Hill, North Carolina 27599 (USA)

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.

• OSTI ID: 6917224
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 41:4; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GENERAL RELATIVITY THEORY
TUNNEL EFFECT
UNIVERSE
COSMOLOGICAL CONSTANT
COSMOLOGY
EQUATIONS OF MOTION
EQUATIONS OF STATE
EUCLIDEAN SPACE
INSTANTONS
QUANTUM GRAVITY
QUANTUM MECHANICS
SCALAR FIELDS
SEMICLASSICAL APPROXIMATION
DIFFERENTIAL EQUATIONS
EQUATIONS
FIELD THEORIES
MATHEMATICAL SPACE
MECHANICS
PARTIAL DIFFERENTIAL EQUATIONS
QUANTUM FIELD THEORY
QUASI PARTICLES
RIEMANN SPACE
SPACE
640106* - Astrophysics & Cosmology- Cosmology