Axions and the graceful exit problem in string cosmology

1995/10/17 by Nemanja Kaloper, N. Kaloper, R. Madden +3 · 2 citations
Physics and Astronomy · #Action (physics) #Axion #Black Holes and Theoretical Physics #Cosmology #Cosmology and Gravitation Theories #Inflation (cosmology) #Noncommutative and Quantum Gravity Theories #Space (punctuation) #String (physics) #String cosmology #String theory #astro-ph #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1016/0370-2693(95)01577-9

published as Phys.Lett.B371:34-40,1996 · 12 pages, latex, no figures

arxiv created 1995/10/17 · openalex publication_date 1996/03/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We reexamine the graceful exit problem in the Pre-Big-Bang inflationary scenario. The dilaton-gravity action is generalized by adding the axion and a general axion/dilaton potential. We provide a phase space analysis of the dynamics which leads us to extend the previous no-go theorem and rule out the branch change necessary for graceful exit in this context.

Citations

• COSMOLOGICAL SOLUTIONS WITH DILATON AND MAXIMALLY SYMMETRIC SPACE IN STRING THEORY
• Superstrings in the early universe
• Nucleosynthesis and the time dependence of fundamental couplings
• Effective gravity theories with dilations
• Higher-derivative Lagrangians, nonlocality, problems, and solutions

Cited by

• Expanding and contracting universes in third quantized string cosmology
• Boundary conditions in quantum string cosmology