Cosmology in scalar tensor theory and asymptotically de-Sitter Universe

Abstract

We have investigated the cosmological scenarios with a four dimensional effective action which is connected with multidimensional, supergravity and string theories. The solution for the scale factor is such that initially universe undergoes a decelerated expansion but in late times it enters into the accelerated expansion phase. Infact, it asymptotically becomes a de-Sitter universe. The dilaton field in our model is a decreasing function of time and it becomes a constant in late time resulting the exit from the scalar tensor theory to the standard Einstein's gravity. Also the dilaton field results the existence of a positive cosmological constant in late times.

arXiv comment7 pages, Revtex Style, 6 Postscript figures

References in corpus (7)

• Cosmological Imprint of an Energy Component with General Equation of State
• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation
• Cosmological scaling solutions of non-minimally coupled scalar fields
• Cosmic acceleration without quintessence
• Inflationary Models with Logarithmic Potentials
• The propensity of molecules to spatially align in intense light fields

Cited by in corpus (51)

• Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
• Quintessence as a run-away dilaton
• Cosmology with Interaction between Phantom Dark Energy and Dark Matter and the Coincidence Problem
• Tracking and coupled dark energy as seen by WMAP
• Generalized Chaplygin gas and CMBR constraints
• WMAP Constraints on the Generalized Chaplygin Gas Model
• The Revival of the Unified Dark Energy-Dark Matter Model ?
• Latest Supernova data in the framework of Generalized Chaplygin Gas model
• Baryon bias and structure formation in an accelerating universe
• Superquintessence
• Stationary dark energy with a baryon-dominated era: solving the coincidence problem with a linear coupling
• Brans-Dicke Scalar Field as a Chameleon
• Expected constraints on the generalized Chaplygin equation of state from future supernova experiments and gravitational lensing statistics
• Modified gravity and the stability of de Sitter space
• Acceleration of the universe with a simple trigonometric potential
• Constraints on the interaction and self-interaction of dark energy from cosmic microwave background
• Quintessence Model With Double Exponential Potential
• Supernovae constraints on models of dark energy revisited
• Gamma-ray bursts as dark energy-matter probes in the context of the generalized Chaplygin gas model
• Non-minimal quintessence and phantom with nearly flat potentials
• Emergent universe in a Jordan-Brans-Dicke theory
• CMB constraints on interacting cosmological models
• An interacting scalar field and the recent cosmic acceleration
• On the Stability of Jordan-Brans-Dicke Static Universe
• Observational Constraints on Cardassian Expansion
• Testing Fractional Action Cosmology
• $\gamma$ Parameter and Solar System constraint in Chameleon Brans Dick Theory
• Fine Tuning Free Paradigm of Two Measures Theory: K-Essence, Absence of Initial Singularity of the Curvature and Inflation with Graceful Exit to Zero Cosmological Constant State
• Chameleon field and the late time acceleration of the universe
• Exotic Low Density Fermion States in the Two Measures Field Theory: Neutrino Dark Energy
• Brans-Dicke cosmology with a scalar field potential
• Absence of the Fifth Force Problem in a Model with Spontaneously Broken Dilatation Symmetry
• Extended quintessence, inflation, and stable de Sitter spaces
• WMAP constraints on Cardassian model
• Fractional-order derivatives in cosmological models of accelerated expansion
• Cosmic acceleration in non-canonical scalar field model - An interacting scenario
• Modified Brans-Dicke cosmology with matter-scalar field interaction
• SNLS data are consistent with acceleration at z=3
• A late time acceleration of the universe with two scalar fields : many possibilities
• Cosmology With Non-Minimally Coupled K-Field
• Generalised scalar-tensor theory and the cosmic acceleration
• Quark-hadron phase transition in a chameleon Brans-Dicke model of brane gravity
• WMAP Constraints on Quintessence
• Non-Minimal Quintessence With Nearly Flat Potential
• Non-local dilaton coupling to dark matter: cosmic acceleration and pressure backreaction
• Brane Dynamics in the Randall-Sundrum model, Inflation and Graceful Exit
• Accelerating Universe from Extra Spatial Dimension
• Non-Minimal Cosmological Model in Modified Yang--Mills Theory
• Cosmic acceleration in a model of scalar-tensor gravitation
• Perturbations growth and bias during acceleration
• Quark-hadron phase transition in DGP including BD brane