2004/07/31 by Martin Bojowald, Roy Maartens, Parampreet Singh · 1 citation
Physics and Astronomy · #hep-th #astro-ph #gr-qc
paper · pdf · doi:10.1103/physrevd.70.083517
published as Phys.Rev. D70 (2004) 083517 · 6 pages, 4 figures; v2: minor changes to match PRD version
arxiv created 2004/09/23 · arxiv updated 2009/12/01
Loop quantum gravity introduces strong non-perturbative modifications to the dynamical equations in the semi-classical regime, which are responsible for various novel effects, including resolution of the classical singularity in a Friedman universe. Here we investigate the modifications for the case of a cyclic universe potential, assuming that we can apply the four-dimensional loop quantum formalism within the effective four-dimensional theory of the cyclic scenario. We find that loop quantum effects can dramatically alter the near-collision dynamics of the cyclic scenario. In the kinetic-dominated collapse era, the scalar field is effectively frozen by loop quantum friction, so that the branes approach collision and bounce back without actual collision.