Cosmological solutions of type II string theory

1996/08/29 by Andre Lukas, André Lukas, Burt A. Ovrut +1 · 12 citations
Physics and Astronomy · #Advanced Differential Geometry Research #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #hep-th

paper · pdf · doi:10.1016/s0370-2693(96)01575-4

published as Phys.Lett. B393 (1997) 65-71 · 13 pages, LATEX, 2 eps figures

arxiv created 1996/08/29 · openalex publication_date 1997/02/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study cosmological solutions of type II string theory with a metric of the Kaluza-Klein type and nontrivial Ramond-Ramond forms. It is shown that models with only one form excited can be integrated in general. Moreover, some interesting cases with two nontrivial forms can be solved completely since they correspond to Toda models. We find two types of solutions corresponding to a negative time superinflating phase and a positive time subluminal expanding phase. The two branches are separated by a curvature singularity. Within each branch the effect of the forms is to interpolate between different solutions of pure Kaluza-Klein theory.

Citations

• Microscopic Origin of the Bekenstein-Hawking Entropy

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