1994/07/01 by Elias Kiritsis, E. Kiritsis, Kiritsis, E. +3
Computer Science · Physics and Astronomy · #Astrophysics (astro-ph) #Black Holes and Theoretical Physics #Computational Physics and Python Applications #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #astro-ph #gr-qc #hep-th
paper · pdf · doi:10.48550/arxiv.hep-th/9407005
LaTeX, 28pp. CERN-TH.7328/94
openalex publication_date 1994/07/01 · arxiv created 1994/07/06 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Exact string solutions are presented, where moduli fields are varying with time. They provide examples where a dynamical change of the topology of space is occurring. Some other solutions give cosmological examples where some dimensions are compactified dynamically or simulate pre-big bang type scenarios. Some lessons are drawn concerning the region of validity of effective theories and how they can be glued together, using stringy information in the region where the geometry and topology are not well defined from the low energy point of view. Other time dependent solutions are presented where a hierarchy of scales is absent. Such solutions have dynamics which is qualitatively different and resemble plane gravitational waves. Talk presented by E. Kiritsis in the 2ème Journée Cosmologie, Observatoire de Paris, 2-4 June 1994.