Cosmological D-instantons and cyclic universes

EA Bergshoeff*, A Collinucci, D Roest, JG Russo, PK Townsend

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)
266 Downloads (Pure)

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.

Original languageEnglish
Pages (from-to)2635-2652
Number of pages18
JournalClassical and Quantum Gravity
Volume22
Issue number13
DOIs
Publication statusPublished - 7-Jul-2005

Cite this