D-instantons and Closed String Tachyons in Misner Space

Details D-instantons and Closed String Tachyons in Misner Space D-instantons and Closed String Tachyons in Misner Space

2005-10-16

arxiv.org/abs/hep-th/0510129v2

JHEP 0601:054,2006

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, 1 figure, minor changes

Scientific paper

10.1088/1126-6708/2006/01/054

We investigate closed string tachyon condensation in Misner space, a toy model for big bang universe. In Misner space, we are able to condense tachyonic modes of closed strings in the twisted sectors, which is supposed to remove the big bang singularity. In order to examine this, we utilize D-instanton as a probe. First, we study general properties of D-instanton by constructing boundary state and effective action. Then, resorting to these, we are able to show that tachyon condensation actually deforms the geometry such that the singularity becomes milder.

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