Cosmology With Non-Minimally Coupled K-Field

Abstract

We consider non-minimally coupled (with gravity) scalar field with non-canonical kinetic energy. The form of the kinetic term is of Dirac-Born-Infeld (DBI) form.We study the early evolution of the universe when it is sourced only by the k-field, as well as late time evolution when both the matter and k-field are present. For the k-field, we have considered constant potential as well as potential inspired from Boundary String Field Theory (B-SFT). We show that it is possible to have inflationary solution in early time as well as late time accelerating phase. The solutions also exhibit attractor property in a sense that it does not depend on the initial conditions for a certain values of the parameters.

10 pages, Revtex style, 14 eps figures, to appear in General Relativity and Gravitation

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• Dynamics of dark energy
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
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• Cosmology with decaying tachyon matter
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• Scaling attractors in interacting teleparallel dark energy
• Cosmological dynamics of tachyonic teleparallel dark energy
• Constraining dark energy with gamma-ray bursts
• A novel teleparallel dark energy model
• Stability of scalar perturbations in scalar-torsion $f(T,\varphi )$ gravity theories in the presence of a matter fluid
• Solar System Constraints on Scalar Tensor Theories with Non-Standard Action
• Reheating constraints on K-inflation
• Modelling Tachyon Cosmology with Non-Minimal Derivative Coupling to Gravity
• Geodesic structure of generalized Vaidya spacetime through the K-essence
• Collapsing scenarios of K-essence generalized Vaidya spacetime under $f(\bar{R},\bar{T})$ gravity
• Cosmological Dynamics in Interacting Scalar-Torsion f(T,$\varphi$) Gravity: Investigating Energy and Momentum Couplings
• NEC violation in $f(\bar{R},\bar{T})$ gravity in the context of a non-canonical theory via modified Raychaudhuri equation
• Interacting dark matter and q-deformed dark energy non-minimally coupled to gravity