Phantom Behavior Bounce with Tachyon and Non-minimal Derivative Coupling

Abstract

The bouncing cosmology provides a successful solution of the cosmological singularity problem. In this paper, we study the bouncing behavior of a single scalar field model with tachyon field non-minimally coupled to itself, its derivative and to the curvature. By utilizing the numerical calculations we will show that the bouncing solution can appear in the universe dominated by such a quintom matter with equation of state crossing the phantom divide line. We also investigate the classical stability of our model using the phase velocity of the homogeneous perturbations of the tachyon scalar field.

15 pages, 8 figures, Accepted for publication in JCAP. arXiv admin note: substantial text overlap with arXiv:1105.4967

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• Cosmology with non-minimal derivative couplings: perturbation analysis and observational constraints
• Curvaton with nonminimal derivative coupling to gravity
• Cosmological models in modified gravity theories with extended nonminimal derivative couplings
• Curvaton with Nonminimal Derivative Coupling to Gravity II: Full Perturbation Analysis
• New DBI Inflation model with Kinetic Coupling to Einstein Gravity
• Canonical and phantom scalar fields as an interaction of two perfect fluids
• Rapid Oscillatory quintessence with variable equation of state parameter in non minimal derivative coupling model
• Reheating mechanism of Curvaton with Nonminimal Derivative Coupling to Gravity