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Quantum cosmological entropy production and the asymmetry of thermodynamic time

Title
Quantum cosmological entropy production and the asymmetry of thermodynamic time
Authors
Kim S.P.Kim S.-W.
Ewha Authors
김성원
SCOPUS Author ID
김성원scopus
Issue Date
1995
Journal Title
Physical Review D
ISSN
0556-2821JCR Link
Citation
vol. 51, no. 8, pp. 4254 - 4258
Indexed
SCOPUS scopus
Abstract
The Hamiltonian for the time-dependent Schrödinger equation for matter fields derived from the Wheeler-DeWitt equation for a quantum minisuperspace cosmological model minimally coupled to free massive minimal scalar fields consists of a set of parameter-dependent and implicitly cosmological time-dependent harmonic oscillators. By using the generalized invariant method we obtain the exact quantum states whose number states at an earlier gravitational configuration in an expanding stage get evolved unitarily by a squeeze operator into the same number states at the later identical gravitational configuration in the subsequent recollapsing stage. It is proposed that during an expansion and the subsequent recollapse of the Universe following a wide class of wave functions of the quantum minisuperspace cosmological model, the cosmological entropy production determined by the squeeze parameters may break the symmetry of the thermodynamic time. © 1995 The American Physical Society.
DOI
10.1103/PhysRevD.51.4254
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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