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Bulk viscous quintessential inflation

Jaume Haro
(
- Barcelona, Polytechnic U.
)
,
Supriya Pan
(
- Jadavpur U.
)

Dec 9, 2015

20 pages

Published in:

Int.J.Mod.Phys.D 27 (2018) 05, 1850052

Published: Jan 15, 2018

e-Print:

1512.03033 [gr-qc]

DOI:

10.1142/S0218271818500529

View in:

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Abstract: (WSP)

In a spatially-flat Friedmann–Lemaître–Robertson–Walker universe, the incorporation of bulk viscous process in general relativity leads to an appearance of a nonsingular background of the universe that both at early and late times depicts an accelerated universe. These early and late scenarios of the universe can be analytically calculated and mimicked, in the context of general relativity, by a single scalar field whose potential could also be obtained analytically where the early inflationary phase is described by a one-dimensional Higgs potential and the current acceleration is realized by an exponential potential. We show that the early inflationary universe leads to a power spectrum of the cosmological perturbations which match with current observational data, and after leaving the inflationary phase, the universe suffers a phase transition needed to explain the reheating of the universe via gravitational particle production. Furthermore, we find that at late times, the universe enters into the de Sitter phase that can explain the current cosmic acceleration. Finally, we also find that such bulk viscous-dominated universe attains the thermodynamical equilibrium, but in an asymptotic manner.

Note:

Version accepted for publication in IJMPD

98.80.Bp
98.80.Cq
98.80.Jk
Inflation
quintessence
bulk viscous
nonsingular
inflation
general relativity
viscosity

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Figures(2)

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