de Sitter Vacua in String Theory.

Kachru, S. ; Kallosh, R. ; Linde, A. ; Trivedi, S. P.

Technical Information Center Oak Ridge Tennessee

关键词: String models;    de Sitter group;    Cosmological constant;    Construction;    Bubbles;   

RP-ID  :  DE2003812628

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We outline the construction of metastable de Sitter vacua of type IIB string theory. Our starting point is highly warped IIB compactifications with nontrivial NS and RR three-form fluxes. By incorporating known corrections to the superpotential from Euclidean D-brane instantons or gaugino condensation, one can make models with all moduli fixed, yielding a supersymmetric AdS vacuum. Inclusion of a small number of D3 branes in the resulting warped geometry allows one to uplift the AdS minimum and make it a metastable de Sitter ground state. The lifetime of our metastable de Sitter vacua is much greater than the cosmological timescale of 1010 years. We also prove, under certain conditions, that the lifetime of dS space in string theory will always be shorter than the recurrence time.