Winding String Condensation and Noncommutative Deformation of Spacelike Singularity

Details Winding String Condensation and Noncommutative Deformation of Spacelike Singularity Winding String Condensation and Noncommutative Deformation of Spacelike Singularity

2005-12-23

arxiv.org/abs/hep-th/0512299v6

Phys.Rev.D74:046005,2006

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, no figures, harvmac; references added; added a section of discussion on disk and cylinder amplitudes

Scientific paper

10.1103/PhysRevD.74.046005

In a previous paper (hep-th/0509067) using matrix model, we showed that closed string tachyons can resolve spacelike singularity in one particular class of Misner space (with anti-periodic boundary conditions for fermions around the spatial circle). In this note, we show that for Misner space without closed string tachyons, there also exists a mechanism to resolve the singularity in the context of the matrix model, namely cosmological winding string production. We show that here space and time also become noncommutative due to these winding strings. Employing optical theorem, we study the bulk boundary coupling by calculating the four-open-string cylinder amplitudes.

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