Stable Isotropic Cosmological Singularities in Quadratic Gravity

Details Stable Isotropic Cosmological Singularities in Quadratic Gravity Stable Isotropic Cosmological Singularities in Quadratic Gravity

2007-02-16

arxiv.org/abs/gr-qc/0702098v1

Phys.Rev.D75:123515,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

18 pages, no figures

Scientific paper

10.1103/PhysRevD.75.123515

We show that, in quadratic lagrangian theories of gravity, isotropic cosmological singularities are stable to the presence of small scalar, vector and tensor inhomogeneities. Unlike in general relativity, a particular exact isotropic solution is shown to be the stable attractor on approach to the initial cosmological singularity. This solution is also known to act as an attractor in Bianchi universes of types I, II and IX, and the results of this paper reinforce the hypothesis that small inhomogeneous and anisotropic perturbations of this attractor form part of the general cosmological solution to the field equations of quadratic gravity. Implications for the existence of a 'gravitational entropy' are also discussed.

Affiliated with

Also associated with

No associations

Rating

Stable Isotropic Cosmological Singularities in Quadratic Gravity 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 Stable Isotropic Cosmological Singularities in Quadratic Gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stable Isotropic Cosmological Singularities in Quadratic Gravity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-196339