TY - JOUR
T1 - A delicate universe
T2 - Compactification obstacles to D-brane inflation
AU - Baumann, Daniel
AU - Dymarsky, Anatoly
AU - Klebanov, Igor R.
AU - McAllister, Liam
AU - Steinhardt, Paul J.
PY - 2007/10/1
Y1 - 2007/10/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.99.141601
DO - 10.1103/PhysRevLett.99.141601
M3 - Article
AN - SCOPUS:34948882707
SN - 0031-9007
VL - 99
JO - Physical Review Letters
JF - Physical Review Letters
IS - 14
M1 - 141601
ER -