A Delicate Universe
arXiv:0705.3837 · doi:10.1103/PhysRevLett.99.141601
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, z_1 = constant, 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.
4 pages, 2 figures
References in corpus (2)
Cited by in corpus (41)
- Monodromy in the CMB: Gravity Waves and String Inflation
- Les Houches Lectures on Constructing String Vacua
- D-brane Deconstructions in IIB Orientifolds
- Axion Inflation in Type II String Theory
- Volume Modulus Inflation and the Gravitino Mass Problem
- Phenomenology of D-Brane Inflation with General Speed of Sound
- Holographic Systematics of D-brane Inflation
- Accidental Inflation in String Theory
- Prospects of inflation in delicate D-brane cosmology
- Inflation from Wrapped Branes
- K-inflationary Power Spectra in the Uniform Approximation
- N-flation from multiple DBI type actions
- Surviving the crash: assessing the aftermath of cosmic bubble collisions
- Update of D3/D7-Brane Inflation on K3 x T^2/Z_2
- Searching for Inflation in Simple String Theory Models: An Astrophysical Perspective
- D3-brane Vacua in Stabilized Compactifications
- Volume modulus inflection point inflation and the gravitino mass problem
- Constraints on Brane Inflation and Cosmic Strings
- Field dynamics and tunneling in a flux landscape
- Brane Inflation is Attractive
- Axionic D3-D7 Inflation
- Systematics of multi-field effects at the end of warped brane inflation
- Inflation on an Open Racetrack
- Dangerous Angular KK/Glueball Relics in String Theory Cosmology
- Inflation in DBI models with constant gamma
- How Delicate is Brane-Antibrane Inflation?
- Brane/flux annihilation transitions and nonperturbative moduli stabilization
- Fine-tuning criteria for inflation and the search for primordial gravitational waves
- Brane Inflation and the Overshoot Problem
- Curvatons in Warped Throats
- Assisted Inflation from Geometric Tachyon
- A Phase Transition between Small and Large Field Models of Inflation
- New developments on embedding inflation in gauge theory and particle physics
- Topology from Cosmology
- Conformal Inflation, Modulated Reheating, and WMAP5
- Inflation and The Minimal Supersymmetric Standard Model
- Nonsupersymmetric brane vacua in stabilized compactifications
- Constraints on brane inflation from WMAP3
- Gauge-String Dualities and Some Applications
- Brane Inflation and Fine Tuning
- On the four-dimensional effective theories in brane-worlds