The C/Z_N orbifold of type II string theory is the simplest and best studied system for the study of localized closed string tachyon condensation. We will obtain new information about this system at large N by showing that it is related by mirror symmetry to a simple gravity background, and that some of the tachyons of C/Z_N are reflected in this dual picture as Gregory-Laflamme-like gravitational instabilities.

References : hep-th/0312213, hep-th/0405064