Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Scalar-metric Cosmology with Chaplygin gas   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 Schr\"{o}dinger-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 behaviour 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.

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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
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The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
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The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga