A delicate universe: Compactification obstacles to D-brane inflation

Daniel Baumann, Anatoly Dymarsky, Igor R. Klebanov, Liam McAllister, Paul J. Steinhardt

Research output: Contribution to journalArticlepeer-review

133 Scopus citations


We investigate whether explicit models of warped D-brane inflation are possible in string compactifications. To this end, we study the potential for D3-brane motion in a warped conifold that includes holomorphically embedded D7-branes involved in moduli stabilization. The presence of the D7-branes significantly modifies the inflaton potential. We construct an example based on a very simple and symmetric embedding due to Kuperstein, z1=const, in which it is possible to fine-tune the potential so that slow-roll inflation can occur. The resulting model is rather delicate: inflation occurs in the vicinity of an inflection point, and the cosmological predictions are extremely sensitive to the precise shape of the potential.

Original languageEnglish (US)
Article number141601
JournalPhysical review letters
Issue number14
StatePublished - Oct 1 2007

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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