Brane Cosmology with the Chameleon Scalar Field in Bulk

Abstract

In this work we investigate the effect of a kind of scalar field, called chameleon, on the evolution of universe. We put this scalar field in the bulk. It is displayed that this scalar field gives us an exponential expansion in early time which may concern inflation. Interaction between scalar field and matter bring some complications in our analysis, however it is shown that by defining an effective potential, we could recover conventional equation at inflation era. After inflation, and entering the universe in radiation era, the exponential expansion is omitted. Also, in late time the universe possess an accelerated expansion. In the last section, the validity of generalized second law of thermodynamic, with assumption the validity of first law is considered.

10 pages, No figures. arXiv admin note: text overlap with arXiv:0805.1792 by other authors

References in corpus (6)

• Thermodynamical Properties of Apparent Horizon in Warped DGP Braneworld
• Thermodynamics of Apparent Horizon in Brane World Scenario
• Unified dark energy thermodynamics: varying w and the -1-crossing
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Cited by in corpus (13)

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• Generalized second law of thermodynamics in scalar-tensor gravity
• Non-minimal geometry-matter couplings in Weyl-Cartan space-times: $f(R,T,Q,T_m)$ gravity
• Brane Constant-roll Inflation
• Quark-hadron phase transition in a chameleon Brans-Dicke model of brane gravity
• Warm inflation with non-comoving scalar field and radiation fluid
• On the holographic dark energy in chameleon scalar-tensor cosmology
• Effect of the Chameleon Scalar Field on Brane Cosmological Evolution
• QCD phase transition with a power law chameleon scalar field in the bulk
• (Non-) geodesic motion in chameleon Brans Dicke model
• Quark-hadron phase transition in DGP including BD brane
• BPS brane cosmology in N=2 supergravity
• Black hole ringdown spectroscopy of curvature-coupled scalar and pseudoscalar fields