No open or flat bouncing cosmologies in Einstein gravity

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Abstract: We show that, to first approximation, strings cannot propagate in bouncing open or flat Friedmann-Robertson-Walker universes. Specifically, the Virasoro constraint translates to the Ricci convergence condition in spacetime at leading order in the alpha-prime expansion. Thus one must go beyond minimally-coupled classical Einstein gravity in order to find bounce solutions that could be consistent with string theory. We map out some remaining possibilities for finding string-compatible cosmological bounces.

Original languageEnglish (US)
Article number89
JournalJournal of High Energy Physics
Volume2015
Issue number10
DOIs
StatePublished - Oct 1 2015

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strings
gravitation
string theory
universe
expansion
approximation

Keywords

  • Bosonic Strings
  • Classical Theories of Gravity

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

No open or flat bouncing cosmologies in Einstein gravity. / Parikh, Maulik.

In: Journal of High Energy Physics, Vol. 2015, No. 10, 89, 01.10.2015.

Research output: Contribution to journalArticle

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