Saltatory de Sitter string vacua

Cristina Escoda, Marta Gómez-Reino, Fernando Quevedo

Research output: Contribution to journalReview articlepeer-review

Abstract

We extend a recent scenario of Kachru, Kallosh, Linde and Trivedi to fix the string moduli fields by using a combination of fluxes and non-perturbative superpotentials, leading to de Sitter vacua. In our scenario the non-perturbative superpotential is taken to be either, the racetrack scenario or the N = 1* superpotential for an SU(N) theory, originally computed by Dorey and recently rederived using the techniques of Dijkgraaf-Vafa. The fact that this superpotential includes the full instanton contribution gives rise to the existence of a large number of minima, increasing with N. In the absence of supersymmetry breaking these correspond to supersymmetric anti de Sitter vacua. The introduction of antibranes lifts the minima to a chain of (non-supersymmetric) de Sitter minima with the value of the cosmological constant decreasing with increasing compactification scale. Surprisingly a similar picture occurs for the simpler system of the racetrack scenario. The relative semiclassical stability of these vacua is studied. Possible cosmological implications of these potentials are also discussed.

Original languageEnglish (US)
Pages (from-to)1499-1531
Number of pages33
JournalJournal of High Energy Physics
Volume7
Issue number11
DOIs
StatePublished - Nov 1 2003

Keywords

  • D-branes
  • Superstring Vacua

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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