Cycling in the throat

Damien Easson, Ruth Gregory, Ivonne Zavala, Gianmassimo Tasinato

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


We analyse the dynamics of a probe D3-(anti-)brane propagating in a warped string compactification, making use of the Dirac-Born-Infeld action approximation. We also examine the time dependent expansion of such moving branes from the ''mirage cosmology'' perspective, where cosmology is induced by the brane motion in the background spacetime. A range of physically interesting backgrounds are considered: AdS5, Klebanov-Tseytlin and Klebanov-Strassler. Our focus is on exploring what new phenomenology is obtained from giving the brane angular momentum in the extra dimensions. We find that in general, angular momentum creates a centrifugal barrier, causing bouncing cosmologies. More unexpected, and more interesting, is the existence of bound orbits, corresponding to cyclic universes.

Original languageEnglish (US)
Article number026
JournalJournal of High Energy Physics
Issue number4
StatePublished - Apr 1 2007
Externally publishedYes


  • D-branes
  • Flux compactifications

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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