Inflation from Geometrical Tachyons
arXiv:hep-th/0504226 · doi:10.1103/PhysRevD.72.083519
Abstract
We propose an alternative formulation of tachyon inflation using the geometrical tachyon arising from the time dependent motion of a BPS -brane in the background geometry due to parallel 5-branes arranged around a ring of radius . Due to the fact that the mass of this geometrical tachyon field is times smaller than the corresponding open-string tachyon mass, we find that the slow roll conditions for inflation and the number of e-foldings can be satisfied in a manner that is consistent with an effective 4-dimensional model and with a perturbative string coupling. We also show that the metric perturbations produced at the end of inflation can be sufficiently small and do not lead to the inconsistencies that plague the open string tachyon models. Finally we argue for the existence of a minimum of the geometrical tachyon potential which could give rise to a traditional reheating mechanism.
Latex, 20 pages, 4 figures; correction of algebraic errors in section 5 concerning the tachyon potential near its minimum. Conclusions unchanged
References in corpus (36)
- Rolling Tachyon
- Tachyon Matter
- Cosmological Evolution of the Rolling Tachyon
- Tachyon Dynamics in Open String Theory
- Lectures on string/brane cosmology
- Prospects and Problems of Tachyon Matter Cosmology
- Inflation from a Tachyon Fluid?
- Brane Interaction as the Origin of Inflation
- Aspects of Tachyonic Inflation with Exponential Potential
- Thoughts on Tachyon Cosmology
- Problems with Tachyon Inflation
- Assisted Tachyonic Inflation
- Cosmological perturbations in a generalized gravity including tachyonic condensation
- On the Cosmological Relevance of the Tachyon
- Cosmological Constraints on Tachyon Matter
- Warped Reheating in Brane-Antibrane Inflation
- Reheating from Tachyon Condensation
- Tachyonic Inflation in the Braneworld Scenario
- Slow-roll parameters in braneworld cosmologies
- Cosmology from Rolling Massive Scalar Field on the anti-D3 Brane of de Sitter Vacua
- On: Natural Inflation
- Observational constraints on patch inflation in noncommutative spacetime
- D-Brane Dynamics Near NS5-Branes
- Boundary States for the Rolling D-branes in NS5 Background
- D-Brane Dynamics in Dp-Brane Background
- Comments on D-brane Dynamics Near NS5-Branes
- Lectures on string theory and cosmology
- D-brane Dynamics in RR Deformation of NS5-branes Background and Tachyon Cosmology
- A Geometric Interpretation of the Open String Tachyon
- Rolling Down the Throat in NS5-brane Background: The Case of Electrified D-Brane
- D-Brane Dynamics and NS5 Rings
- Non-BPS D-brane Near NS5-branes
- Creating the Universe from Brane-Antibrane Annihilation
- Tachyonic Inflation in a Warped String Background
- Non-BPS Dp-Brane in the Background of NS5-Branes on Transverse R^3xS^1
- Note on DBI dynamics of Dbrane Near NS5-branes
Cited by in corpus (25)
- Dynamics of dark energy
- Inflation Dynamics and Reheating
- Cosmological inflation in gravity
- Prospects of inflation in delicate D-brane cosmology
- Inflation and dark energy arising from geometrical tachyons
- Observational constraints on Gauss-Bonnet cosmology
- Accelerating Branes and the String/Black Hole Transition
- Inflation from D3-brane motion in the background of D5-branes
- Fuzzy Sphere Dynamics and Non-Abelian DBI in Curved Backgrounds
- Inflation with improved D3-brane potential and the fine tunings associated with the model
- Prospects of inflation with perturbed throat geometry
- Geometrical Tachyon Dynamics in the Background of a Bulk Tachyon Field
- Electrified Fuzzy Spheres and Funnels in Curved Backgrounds
- Tachyon inflation in an AdS braneworld with back-reaction
- Assisted Inflation from Geometric Tachyon
- A Quintessentially Geometric Model
- Geometric Tachyon to Universal Open String Tachyon
- Origin of the geometric tachyon
- Observational Status of Tachyon Natural Inflation and Reheating
- Black Hole - String Transition and Rolling D-brane
- Spinflation from Geometric Tachyon
- Anti-de Sitter D-brane dynamics
- Proper acceleration, geometric tachyon and dynamics of a fundamental string near D branes
- Motion of a Test Particle in the Transverse space of Dp-Branes
- Warming up D3 brane motion in the background of D5 brane and Inflation