期刊
PHYSICS LETTERS B
卷 697, 期 2, 页码 101-106出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2011.01.054
关键词
Quantum scalar-metric cosmology; Saez-Ballester theory; Chaplygin gas; Schutz formalism
A spatially flat Friedmann-Robertson-Walker (FRW) cosmological model with generalized Chaplygin gas is studied in the context of scalar-metric formulation of cosmology. Schutz's mechanism for the perfect fluid is applied with generalized Chaplygin gas and the classical and quantum dynamics for this model is studied. It is found that the only surviving matter degree of freedom played the role of cosmic time. For the quantum mechanical description it is possible to find the wave packet which resulted from the linear superposition of the wave functions of the Schrodinger-Wheeler-DeWitt (SWD) equation, which is a consequence of the above formalism. The wave packets show two distinct dominant peaks and propagate in the direction of increasing scale factor. It may happen that our present universe originated from one of those peaks. The many-world and ontological interpretation of quantum mechanics is applied to investigate about the behavior of the scale factor and the scalar field (considered for this model). In both the cases the scale factor avoids singularity and a bouncing non-singular universe is found. (c) 2011 Elsevier B.V. All rights reserved.
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