A Delicate Universe: Compactification Obstacles to D-brane Inflation
- Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)
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, z{sub 1}=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.
- OSTI ID:
- 21024227
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 14; Other Information: DOI: 10.1103/PhysRevLett.99.141601; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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