Extended Inflation from Strings

Abstract

We study the possibility of extended inflation in the effective theory of gravity from strings compactified to four dimensions and find that it strongly depends on the mechanism of supersymmetry breaking. We consider a general class of string--inspired models which are good candidates for successful extended inflation. In particular, the $\omega$--problem of ordinary extended inflation is automatically solved by the production of only very small bubbles until the end of inflation. We find that the inflaton field could belong either to the untwisted or to the twisted massless sectors of the string spectrum, depending on the supersymmetry breaking superpotential.

18pp

Cited by in corpus (11)

• Global properties of static spherically symmetric charged dilaton spacetimes with a Liouville potential
• Constraints from Inflation on Scalar-Tensor Gravity Theories
• STATIONARY SOLUTIONS IN BRANS-DICKE STOCHASTIC INFLATIONARY COSMOLOGY
• Exact Superstring Motivated Cosmological Models
• Jordan-Brans-Dicke Quantum Wormholes and Coleman's Mechanism
• Cosmology with exponential potentials
• Jordan-Brans-Dicke Stochastic Inflation
• General Relativity as an Attractor in Scalar-Tensor Stochastic Inflation
• Higher Loop String Cosmology with Moduli and Antisymmetric Tensor Field
• Qualitative evolution in higher-loop string cosmology
• String Effective Actions and Cosmological Stability of Scalar Potentials