A String-Inspired Quintom Model Of Dark Energy

Abstract

We propose in this paper a quintom model of dark energy with a single scalar field $\varphi$ given by the lagrangian $\mathcal{L}=-V(\varphi )\sqrt{1-{\alpha }^{\prime }{\nabla }_{\mu }\varphi {\nabla }^{\mu }\varphi +{\beta }^{\prime }\varphi \square \varphi }$. In the limit of ${\beta }^{\prime }\to$0 our model reduces to the effective low energy lagrangian of tachyon considered in the literature. We study the cosmological evolution of this model, and show explicitly the behaviors of the equation of state crossing the cosmological constant boundary.

6 pages, 4 figures, accepted by PLB

References in corpus (40)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• Measurements of the Cosmological Parameters Omega and Lambda from the First 7 Supernovae at z >= 0.35
• Dark Energy Constraints from the Cosmic Age and Supernova
• Rolling Tachyon
• Tachyon Matter
• Cosmological parameter analysis including SDSS Ly-alpha forest and galaxy bias: constraints on the primordial spectrum of fluctuations, neutrino mass, and dark energy
• Accelerated expansion of the universe driven by tachyonic matter
• Cosmological Evolution of a Quintom Model of Dark Energy
• Can dark energy evolve to the Phantom?
• Field Theory of Tachyon Matter
• Cosmological Evolution of the Rolling Tachyon
• Cosmology with tachyon field as dark energy
• Constraints on holographic dark energy from type Ia supernova observations
• Some Exact Results on Tachyon Condensation in String Field Theory
• Oscillating Quintom and the Recurrent Universe
• Crossing the Phantom Divide: Dark Energy Internal Degrees of Freedom
• What is needed of a tachyon if it is to be the dark energy?
• On Exact Tachyon Potential in Open String Field Theory
• Perturbations of the Quintom Models of Dark Energy and the Effects on Observations
• Crossing of the w=-1 Barrier by D3-brane Dark Energy Model
• Quintom models with an equation of state crossing -1
• Generalized Second Law of Thermodynamics in Quintom Dominated Universe
• Two-field Models of Dark Energy with Equation of State Across -1
• Crossing w=-1 in Gauss-Bonnet Brane World with Induced Gravity
• A Single Scalar Field Model of Dark Energy with Equation of State Crossing -1
• Brane cosmology driven by the rolling tachyon
• Dark-Energy Evolution Across the Cosmological-Constant Boundary
• On the Cosmological Relevance of the Tachyon
• Interacting Vector-like Dark Energy, the First and Second Cosmological Coincidence Problems
• Time and Tachyon
• Cosmic Duality in Quintom Universe
• Decay of Unstable D-branes with Electric Field
• Tachyonic Inflation in the Braneworld Scenario
• Late acceleration and $w=-1$ crossing in induced gravity
• Crossing $w=-1$ by a single scalar on a Dvali-Gabadadze-Porrati brane
• Critical comments on the paper "Crossing $\omega =-1$ by a single scalar field on a Dvali-Gabadadze-Porrati brane" by H Zhang and Z-H Zhu [Phys.Rev.D75,023510(2007)]
• Reconstructing the Equation of State of Tachyon
• Avoiding the Big-Rip Jeopardy in a Quintom Dark Energy Model with Higher Derivatives
• Supernova Constraints on Models of Neutrino Dark Energy

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• Black Holes in Accelerated Universe
• The torsion cosmology in Kaluza-Klein theory
• A short review on Quintom dark energy theory
• Perturbations In Some Dark Energy Models