Coupled Inflation and Brane Gases

Abstract

We study an effective four-dimensional theory with an action with two scalar fields minimally coupled to gravity, and with a matter action which couples to the two scalar fields via an overall field-dependent coefficient in the action. Such a theory could arise from a dimensional reduction of supergravity coupled to a gas of branes winding the compactified dimensions. We show the existence of solutions corresponding to power-law inflation. The graceful exit from inflation can be obtained by postulating the decay of the branes, as would occur if the branes are unstable in the vacuum and stabilized at high densities by plasma effects. This construction provides an avenue for connecting string gas cosmology and the late-time universe.

11 pages

References in corpus (28)

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Cited by in corpus (26)

• Bouncing Universes in String-inspired Gravity
• M-Theory Inflation from Multi M5-Brane Dynamics
• The Phantom Divide in String Gas Cosmology
• Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae
• More on the Spectrum of Perturbations in String Gas Cosmology
• Moduli Stabilization in Brane Gas Cosmology with Superpotentials
• Moduli Stabilization and Inflation Using Wrapped Branes
• Dark energy and decompactification in string gas cosmology
• Current Acceleration from Dilaton and Stringy Cold Dark Matter
• Pre-Inflationary Spacetime in String Cosmology
• Moduli (Dilaton, Volume and Shape) Stabilization via Massless F and D String Modes
• Cyclic Inflation
• Accelerating universes driven by bulk particles
• Brane Gases and Stabilization of Shape Moduli with Momentum and Winding Stress
• The Most Probable Size of the Universe
• Target space duality and moduli stabilization in String Gas Cosmology
• Lovelock inflation and the number of large dimensions
• New developments on embedding inflation in gauge theory and particle physics
• Stabilization of the Extra Dimensions in Brane Gas Cosmology with Bulk Flux
• Perturbations in Bouncing and Cyclic Models, a General Study
• The Relic Problem of String Gas Cosmology
• Colliding Branes and Formation of Spacetime Singularities
• Radion effective potential in brane gas cosmology
• Wrapped brane gas as a candidate for Dark Matter
• Singularities in and Stability of Ooguri-Vafa-Verlinde Cosmologies
• Looking Beyond Inflationary Cosmology