Cosmology with exponential potentials

Details Cosmology with exponential potentials Cosmology with exponential potentials

2004-02-12

arxiv.org/abs/gr-qc/0402059v2

Class.Quant.Grav. 21 (2004) 3871-3886

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

RevTex4, 9 pages, 2 figures, References added

Scientific paper

10.1088/0264-9381/21/16/003

We examine in the context of general relativity the dynamics of a spatially flat Robertson-Walker universe filled with a classical minimally coupled scalar field \phi of exponential potential ~ e^{-\mu\phi} plus pressureless baryonic matter. This system is reduced to a first-order ordinary differential equation, providing direct evidence on the acceleration/deceleration properties of the system. As a consequence, for positive potentials, passage into acceleration not at late times is generically a feature of the system, even when the late-times attractors are decelerating. Furthermore, the structure formation bound, together with the constraints on the present values of \Omega_{m}, w_{\phi} provide, independently of initial conditions and other parameters, necessary conditions on \mu. Special solutions are found to possess intervals of acceleration. For the almost cosmological constant case w_{\phi} ~ -1, as well as, for the generic late-times evolution, the general relation \Omega_{\phi}(w_{\phi}) is obtained.

Affiliated with

Also associated with

No associations

Rating

Cosmology with exponential potentials does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cosmology with exponential potentials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmology with exponential potentials will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-85255