Crossing $w=-1$ by a single scalar on a Dvali-Gabadadze-Porrati brane

Abstract

Recent type Ia supernovae data seem to favor a dark energy model whose equation of state $w(z)$ crosses -1, which is a much more amazing problem than the acceleration of the universe. Either the case that $w(z)$ evolves from above -1 to below -1 or the case that $w(z)$ runs from below -1 to above -1, is consistent with present data. In this paper we show that it is possible to realize the crossing behaviours of both of the two cases by only a single scalar field in frame of Dvali-Gabadadze-Porrati braneworld. At the same time we prove that there does not exist scaling solution in a universe with dust.

8 pages, 4 figs, several references added, minor correction

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• A String-Inspired Quintom Model Of Dark Energy
• Holographic tachyon model
• Constraints on the Sound Speed of Dynamical Dark Energy
• Holographic dark energy in a cyclic universe
• Reconstruction of Hessence Dark Energy and the Latest Type Ia Supernovae Gold Dataset
• Inflationary universe in loop quantum cosmology
• Analytic spectrum of relic gravitational waves modified by neutrino free streaming and dark energy
• Holographic hessence models
• Possible theoretical limits on holographic quintessence from weak gravity conjecture
• Dynamics of Quintom and Hessence Energies in Loop Quantum Cosmology
• Chaplygin DGP cosmologies
• Exact models with non-minimal interaction between dark matter and (either phantom or quintessence) dark energy
• Dynamics of holographic vacuum energy in the DGP model
• Natural Phantom Dark Energy, Wiggling Hubble Parameter $H(z)$ and Direct $H(z)$ Data
• A Non-minimally Coupled Quintom Dark Energy Model on the Warped DGP Brane
• Late-time acceleration and Phantom Divide Line Crossing with Non-minimal Coupling and Lorentz Invariance Violation
• Crossing the Phantom Divide Line in a DGP-Inspired $F(R,\varphi )$-Gravity
• Holographic kinetic k-essence model
• Null Energy Condition and Dark Energy Models
• Self accelerating solutions in a DGP brane with a scalar field trapped on it: the dynamical systems perspective
• Bouncing Universe with Non-minimally Coupled Quintom Matter
• Dynamical-Screening and the Phantom-Like Effects in a DGP-Inspired $F(R,\varphi )$ Model
• A Lorentz Invariance Violating Cosmology on the DGP Brane