The transient and the late time attractor tachyon dark energy: Can we distinguish it from quintessence ?

Abstract

The string inspired tachyon field can serve as a candidate of dark energy. Its equation of state parameter $w$ varies from 0 to -1. In case of tachyon field potential $V(\varphi )\to 0$ slower(faster) than $1/{\varphi }^2$ at infinity, dark energy(dark matter) is a late time attractor. We investigate the tachyon dark energy models under the assumption that $w$ is close to -1. We find that all the models exhibit unique behavior around the present epoch which is exactly same as that of the thawing quintessence.

arXiv comment6 pages, 7 eps figures, Revtex style, minor changes, references added, Accepted in Physical Review D

References in corpus (47)

• Dynamics of dark energy
• The Cosmological Constant and Dark Energy
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Cosmological Constant - the Weight of the Vacuum
• The Case for a Positive Cosmological Lambda-term
• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• The Cosmological Constant
• A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
• Dark Energy and the Accelerating Universe
• Essentials of k-essence
• Coupled Quintessence
• Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
• Cosmological Tracking Solutions
• Kinetically Driven Quintessence
• Rolling Tachyon
• Tachyon Matter
• Accelerated expansion of the universe driven by tachyonic matter
• Field Theory of Tachyon Matter
• Scrutinizing Exotic Cosmological Models Using ESSENCE Supernova Data Combined with Other Cosmological Probes
• Cosmology with tachyon field as dark energy
• Supersymmetric World-volume Action for Non-BPS D-branes
• T-duality and Actions for Non-BPS D-branes
• Tachyon couplings on non-BPS D-branes and Dirac-Born-Infeld action
• Proposal for non-BPS D-brane action
• What is needed of a tachyon if it is to be the dark energy?
• Thawing quintessence with a nearly flat potential
• Cosmological dynamics of the tachyon with an inverse power-law potential
• Tachyon Effective Actions In Open String Theory
• The Dynamics of Quintessence, The Quintessence of Dynamics
• A unified approach to scaling solutions in a general cosmological background
• Holographic tachyon model of dark energy
• Tracking solutions in tachyon cosmology
• Caustics in Tachyon Matter and Other Born-Infeld Scalars
• Observational Bounds on Cosmic Doomsday
• Phantom Dark Energy Models with a Nearly Flat Potential
• On-shell S-matrix and tachyonic effective actions
• Slowly varying tachyon and tachyon potential
• Current Observational Constraints on Cosmic Doomsday
• Cosmological Scaling Solutions of Multiple Tachyon Fields with Inverse Square Potentials
• Aspects of Scalar Field Dynamics in Gauss-Bonnet Brane Worlds
• Tachyon cosmology, supernovae data and the Big Brake singularity
• The coincidence problem in linear dark energy models
• Linearized Bekenstein Varying Alpha Models
• Cosmological Signature of Tachyon Condensation
• Cosmological Evolution of Dirac-Born-Infeld Field
• Role of Tachyonic Field in Accelerating Universe in Presence of Perfect Fluid
• Seeing Darkness: the New Cosmology

Cited by in corpus (26)

• Slow-roll k-essence
• Non-minimal quintessence and phantom with nearly flat potentials
• Interacting new agegraphic tachyon, K-essence and dilaton scalar field models of dark energy in non-flat universe
• Reconstructing interacting entropy-corrected holographic scalar field models of dark energy in non-flat universe
• Post-Planck Dark Energy Constraints
• Interacting viscous ghost tachyon, K-essence and dilaton scalar field models of dark energy
• Interacting entropy-corrected new agegraphic dark energy in non-flat universe
• Dynamical systems analysis of tachyon dark energy model from a new perspective
• The general property of dynamical quintessence field
• On the effect of the degeneracy between w_0 and w_a
• QCD modified ghost scalar field dark energy models
• Constraining Thawing Quintessence
• Imprint of thawing scalar fields on large scale galaxy overdensity
• Solar System Constraints on Scalar Tensor Theories with Non-Standard Action
• Evolution of Spherical Overdensity in Thawing Dark energy Models
• Future evolution in a backreaction model and the analogous scalar field cosmology
• Generalizing thawing dark energy models: the standard vis-à-vis model independent diagnostics
• Interacting viscous entropy-corrected holographic scalar field models of dark energy with time-varying G in modified FRW cosmology
• Prospects of probing quintessence with HI 21-cm intensity mapping survey
• Holographic field theory models of dark energy in interaction with dark matter
• Constraining Thawing Dark Energy using Galaxy Cluster Number Counts
• Ghost Chaplygin scalar field model of dark energy
• Enhanced power of gravitational waves and rapid coalescence of black hole binaries through dark energy accretion
• Torsion and Problems of Standard Cosmology
• Quintessence and tachyon dark energy in interaction with dark matter: Observational constraints and model selection
• Observational constraints on thawing quintessence scalar field model