Winding String Condensation and Noncommutative Deformation of Spacelike Singularity
arXiv:hep-th/0512299 · doi:10.1103/PhysRevD.74.046005
Abstract
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.
16 pages, no figures, harvmac; references added; added a section of discussion on disk and cylinder amplitudes
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