Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2007-02-15
Class.Quant.Grav.24:4543-4586,2007
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
39 pages, 1 figure
Scientific paper
10.1088/0264-9381/24/18/001
We develop a gauge invariant canonical perturbation scheme for perturbations around symmetry reduced sectors in generally covariant theories, such as general relativity. The central objects of investigation are gauge invariant observables which encode the dynamics of the system. We apply this scheme to perturbations around a homogeneous and isotropic sector (cosmology) of general relativity. The background variables of this homogeneous and isotropic sector are treated fully dynamically which allows us to approximate the observables to arbitrary high order in a self--consistent and fully gauge invariant manner. Methods to compute these observables are given. The question of backreaction effects of inhomogeneities onto a homogeneous and isotropic background can be addressed in this framework. We illustrate the latter by considering homogeneous but anisotropic Bianchi--I cosmologies as perturbations around a homogeneous and isotropic sector.
Dittrich Bianca
Tambornino Johannes
No associations
LandOfFree
Gauge invariant perturbations around symmetry reduced sectors of general relativity: applications to cosmology 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 Gauge invariant perturbations around symmetry reduced sectors of general relativity: applications to cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gauge invariant perturbations around symmetry reduced sectors of general relativity: applications to cosmology will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-196326