String gas cosmology

• DOI: 10.1103/revmodphys.78.435
• Publication Date: 2006-05-11T00:04:20Z
• Authors: Thorsten Battefeld; Scott Watson
• Keywords: String cosmology; String phenomenology

A critical review and summary of string gas cosmology is presented. pedagogical derivation the effective action starting from theory, emphasizing necessary approximations that must be invoked, included. Working in at late times it not possible to stabilize extra dimensions by a massive winding modes demonstrated. Additional gases are considered contain so-called enhanced symmetry states. These very heavy initially, but drive moduli locations minimize energy pressure gas. Both classical quantum dynamics considered, where former validity theory questionable some fine-tuning required, latter consistent promising stabilization mechanism valid found. In addition, provide framework explore dark matter, presenting alternatives cold matter model recently Gubser Peebles. Also trapping with as method for including on landscape discussed.