Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2010-11-20
Phys.Rev.D83:085016,2011
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
18 pages; improved discussion and references added; fitted to match published version
Scientific paper
10.1103/PhysRevD.83.085016
A gauge-invariant, linear cosmological perturbation theory of an almost homogeneous and isotropic universe with dynamically evolving Newton constant G and cosmological constant $\Lambda$ is presented. The equations governing the evolution of the comoving fractional spatial gradients of the matter density, G and $\Lambda$ are thus obtained. Explicit solutions are discussed in cosmologies, featuring an accelerated expansion, where both G and $\Lambda$ vary according to renormalization group equations in the vicinity of an ultraviolet fixed point. Finally, a similar analysis is carried out in the late universe regime described by the part of the renormalization group trajectory close to the gaussian fixed point.
No associations
LandOfFree
Evolution of cosmological perturbations in an RG-driven inflationary scenario 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 Evolution of cosmological perturbations in an RG-driven inflationary scenario, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of cosmological perturbations in an RG-driven inflationary scenario will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-221037