Moduli Inflation with Large Scale Structure Produced by Topological Defects

Abstract

It is tempting to inflate along one of the many flat directions that arise in supersymmetric theories. The required flatness of the potential to obtain sufficient inflation and to not overproduce density fluctuations occurs naturally. However, the density perturbations (in the case of a single moduli field) that arise from inflaton quantum fluctuations are too small for structure formation. Here we propose that topological defects (such as cosmic strings), which arise during a phase transition near the end of moduli inflation can provide an alternative source of structure. The strings produced will be `fat', yet have the usual evolution by the time of nucleosynthesis. Possible models are discussed.

12 pages, plain TeX; Comments and references added, version to appear in Phys. Rev. D

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• Beyond the Standard Models with Cosmic Strings
• The Gravitational Wave Spectrum from Cosmological B-L Breaking
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• Cosmic Strings from Supersymmetric Flat Directions
• Successful D-term Inflation with moduli
• Topological hybrid inflation in brane world
• Large scale CMB anomalies from thawing cosmic strings
• Evading the pulsar constraints on the cosmic string tension in supergravity inflation
• Effects of cosmic strings with delayed scaling on CMB anisotropy
• Phase transition and monopole production in supergravity inflation
• Cosmic Strings in Low Mass Higgs Cosmology
• Femto-lensing due to a Cosmic String
• Complementary signatures of $\alpha -$attractor inflation in CMB and cosmic string Gravitational Waves
• Detecting stochastic gravitational wave background from cosmic strings with next-generation detector networks: Component separation based on a multi-source astrophysical foreground noise model