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

130 Citations (Scopus)

Abstract

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
Article number141601
JournalPhysical Review Letters
Volume99
Issue number14
DOIs
Publication statusPublished - 1 Oct 2007
Externally publishedYes

Fingerprint

Dive into the research topics of 'A delicate universe: Compactification obstacles to D-brane inflation'. Together they form a unique fingerprint.

Cite this