Cosmological unification of string theories

Details Cosmological unification of string theories Cosmological unification of string theories

2006-12-13

arxiv.org/abs/hep-th/0612116v3

JHEP0807:022,2008

Physics

High Energy Physics

High Energy Physics - Theory

v2: references added, typos fixed; v3: new sections added; 62 pages, 5 figures

Scientific paper

10.1088/1126-6708/2008/07/022

We present an exact solution of superstring theory that interpolates in time between an initial type 0 phase and a final phase whose physics is exactly that of the bosonic string. The initial theory is deformed by closed-string tachyon condensation along a lightlike direction. In the limit of large tachyon vev, the worldsheet conformal field theory precisely realizes the Berkovits-Vafa embedding of bosonic string theory into superstring theory. Our solution therefore connects the bosonic string dynamically with the superstring, settling a longstanding question about the relationship between the two theories.

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