Cosmological D-instantons and Cyclic Universes
High Energy Physics - Theory
2009-11-11 v2
Abstract
For models of gravity coupled to hyperbolic sigma models, such as the metric-scalar sector of IIB supergravity, we show how smooth trajectories in the `augmented target space' connect FLRW cosmologies to non-extremal D-instantons through a cosmological singularity. In particular, we find closed cyclic universes that undergo an endless sequence of big-bang to big-crunch cycles separated by instanton `phases'. We also find `big-bounce' universes in which a collapsing closed universe bounces off its cosmological singularity to become an open expanding universe.
Keywords
Cite
@article{arxiv.hep-th/0504011,
title = {Cosmological D-instantons and Cyclic Universes},
author = {E. A. Bergshoeff and A. Collinucci and D. Roest and J. G. Russo and P. K. Townsend},
journal= {arXiv preprint arXiv:hep-th/0504011},
year = {2009}
}
Comments
21 pages, 4 figures. v2: minor changes