Cosmology from Moduli Dynamics

Abstract

We investigate moduli field dynamics in supergravity/M-theory like set ups where we turn on fluxes along some or all of the extra dimensions. As has been argued in the context of string theory, we observe that the fluxes tend to stabilize the squashing (or shape) modes. Generically we find that at late times the shape is frozen while the radion evolves as a quintessence field. At earlier times we have a phase of radiation domination where both the volume and the shape moduli are slowly evolving. However, depending on the initial conditions and the parameters of the theory, like the value of the fluxes, curvature of the internal manifold and so on, the dynamics of the internal manifold can be richer with interesting cosmological consequences, including inflation.

38 pages, 6 figures; references added

References in corpus (37)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• A Large Mass Hierarchy from a Small Extra Dimension
• An Alternative to Compactification
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
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• de Sitter Vacua in String Theory
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• Hierarchies from Fluxes in String Compactifications
• Chameleon Cosmology
• Exponential potentials and cosmological scaling solutions
• Hybrid Inflation
• The Cosmic Triangle: Revealing the State of the Universe
• Quintessential inflation
• Quintessence arising from exponential potentials
• Structure formation with a self-tuning scalar field
• Assisted inflation
• Moduli Stabilization from Fluxes in a Simple IIB Orientifold
• Brane Gases in the Early Universe
• Accelerating Cosmologies from S-Branes
• Generalized Assisted Inflation
• Stabilization of Sub-Millimeter Dimensions: The New Guise of the Hierarchy Problem
• Warped Brane Worlds in Six Dimensional Supergravity
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• Compactification for a Three-Brane Universe
• Instanton Cosmology and Domain Walls from M-theory and String Theory
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• Extra Dimensions and Inflation
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• Symmetry Breaking of Gauge Theories via Internal Space Dynamics

Cited by in corpus (12)

• Moduli Stabilization in Brane Gas Cosmology with Superpotentials
• AdS and stabilized extra dimensions in multidimensional gravitational models with nonlinear scalar curvature terms 1/R and R^4
• Deviations From Newton's Law in Supersymmetric Large Extra Dimensions
• UV Sensitivity in Supersymmetric Large Extra Dimensions: The Ricci-flat Case
• Coupled Inflation and Brane Gases
• Current Acceleration from Dilaton and Stringy Cold Dark Matter
• Trapped Quintessential Inflation in the context of Flux Compactifications
• Cyclic Inflation
• MSLED, Neutrino Oscillations and the Cosmological Constant
• Scaling solutions and geodesics in moduli space
• The dynamics of coset dimensional reduction
• Dark energy in hybrid inflation