Cosmological Scaling Solutions with Tachyon:Modified Gravity Model
arXiv:0804.2775 · doi:10.1016/j.physletb.2008.08.038
Abstract
Modifying the Einstein's gravity at large distance scales is one of the interesting proposals to explain the late time acceleration of the universe. In this paper, we analyse scaling solutions in modified gravity models where the universe is sourced by a background matter fluid together with a tachyon type scalar field. We describe a general prescription to calculate the scaling potential in such models. Later on, we consider specific examples of modifications and apply our method to calculate the scaling potential and the scale factor. Our method can be applied to any modified gravity model, in presence of a tachyon field.
6 pages, latex style, modified version, two new figures included, new refernces added, Accepted for publication in Physics Letters B
References in corpus (56)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Dynamics of dark energy
- Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
- Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
- Cosmological Imprint of an Energy Component with General Equation of State
- 4D Gravity on a Brane in 5D Minkowski Space
- Cosmological Constant - the Weight of the Vacuum
- The Case for a Positive Cosmological Lambda-term
- Cosmology and the Fate of Dilatation Symmetry
- Quintessence, Cosmic Coincidence, and the Cosmological Constant
- A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
- k-Inflation
- Essentials of k-essence
- Coupled Quintessence
- Cosmological Tracking Solutions
- Exponential potentials and cosmological scaling solutions
- New Constraints on , , and w from an Independent Set of Eleven High-Redshift Supernovae Observed with HST
- Rolling Tachyon
- Quintessence and the Rest of the World
- Tachyon Matter
- Modified f(R) gravity consistent with realistic cosmology: from matter dominated epoch to dark energy universe
- Cosmology with a Primordial Scaling Field
- Scaling solutions in general non-minimal coupling theories
- Scrutinizing Exotic Cosmological Models Using ESSENCE Supernova Data Combined with Other Cosmological Probes
- The Cosmology of Generalized Modified Gravity Models
- A classification of scalar field potentials with cosmological scaling solutions
- Cosmology with tachyon field as dark energy
- Cosmological scaling solutions of non-minimally coupled scalar fields
- Cardassian Expansion: a Model in which the Universe is Flat, Matter Dominated, and Accelerating
- Can the clustered dark matter and the smooth dark energy arise from the same scalar field ?
- Cosmic Concordance and Quintessence
- Extended Quintessence
- Quintessence and Supergravity
- The Cosmology of Modified Gauss-Bonnet Gravity
- The Robustness of Quintessence
- What is needed of a tachyon if it is to be the dark energy?
- On the spherical collapse model in dark energy cosmologies
- Tracking K-essence
- Bouncing Braneworlds
- The stability of modified gravity models
- Relic Gravity Waves from Braneworld Inflation
- Steep inflation: ending braneworld inflation by gravitational particle production
- Separating Dark Physics from Physical Darkness: Minimalist Modified Gravity vs. Dark Energy
- Self-similar cosmological solutions with a non-minimally coupled scalar field
- Tracking solutions in tachyon cosmology
- General Scalar Fields as Quintessence
- Inhomogeneous Gravity
- Stabilizing the Dilaton in Superstring Cosmology
- A Cosmological Mechanism for Stabilizing Moduli
- Constraints on braneworld inflation from CMB anisotropies
- Tracker fields from nonminimally coupled theory
- Cosmology with decaying tachyon matter
- Generalized Chaplygin Gas in a modified gravity approach
- Tracking quintessential inflation from brane worlds
- Particle physics models of inflation
- Tracking quintessence and k-essence in a general cosmological background
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- Dynamical systems applied to cosmology: dark energy and modified gravity
- Dynamics of a scalar field in Robertson-Walker spacetimes
- Cosmological Dynamics of a Dirac-Born-Infeld field
- Conformally Coupled Tachyonic Dark Energy
- A primer on problems and prospects of dark energy
- Dynamics of tachyon field in spatially curved FRW universe
- k-essence and tachyons in brane-worlds