Flow of Geometries and Instantons on the Null Orbifold

Abstract

We study condensation of twisted sector states in the null orbifold geometry. As the singularity is time-dependent, we probe it using D-Instantons. We present evidence that the null-orbifold flows to the $Z_N$ orbifold. We also comment on the subtleties of quantizing the closed superstring in this background.

arXiv comment32 pages, 2 figures, Latex2e, uses JHEP3.cls; v2: references added

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