A double scaling limit can be defined in string theory on a Calabi-Yau (CY) manifold by approaching a point in moduli space where the CY space develops an isolated singularity and at the same time… (More)

M. R. Douglas, I. R. Klebanov, D. Kutasov, J. Maldacena, E. Martinec, and N. Seiberg 1 Department of Physics, Rutgers University Piscataway, New Jersey 08855-0849, USA 2 I.H.E.S., Le Bois-Marie,… (More)

We investigate the entanglement entropy in gravity duals of confining large N c gauge theories using the proposal of [1]. Dividing one of the directions of space into a line segment of length l and… (More)

We study condensation of closed string tachyons living on defects, such as orbifold fixed planes and Neveu-Schwarz fivebranes. We argue that the high energy density of localized states decreases in… (More)

We argue that vacua of string theory which asymptote at weak coupling to linear dilaton backgrounds are holographic. The full string theory in such vacua is “dual” to a theory without gravity in… (More)

We argue that a class of “non-critical superstring” vacua is holographically related to the (non-gravitational) theory obtained by studying string theory on a singular Calabi-Yau manifold in the… (More)

We clarify a number of issues regarding the worldsheet and spacetime descriptions of string propagation on AdS 3. We construct the vertex operators of spacetime current algebra and spacetime (super)… (More)

We discuss string propagation in the near-horizon geometry generated by Neveu-Schwarz fivebranes, Kaluza-Klein monopoles and fundamental strings. When the fivebranes and KK monopoles are wrapped… (More)