Towards a nonsingular tachyonic big crunch

Robert H. Brandenberger, Andrew R. Frey, Sugumi Kanno

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


We discuss an effective field theory background containing the gravitational field, the dilaton, and a closed string tachyon, and couple this background to a gas of fundamental strings and D strings. Allowing for the possibility of a nonvanishing dilaton potential of Casimir type, we demonstrate the possibility of obtaining a nonsingular, static tachyon condensate phase with fixed dilaton. The time reversal of our solution provides a candidate effective field theory description of a Hagedorn phase of string gas cosmology with fixed dilaton.

Original languageEnglish
Article number063502
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number6
Publication statusPublished - Sept 10 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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