This article reviews the generalization of field theory to space-time with noncommuting
coordinates, starting with the basics and covering most of the active directions of research …

We review recent developments on nonrelativistic string theory. In flat spacetime, the theory
is defined by a two-dimensional relativistic quantum field theory with nonrelativistic global …

String theory is one of the most exciting and challenging areas of modern theoretical
physics. This book guides the reader from the basics of string theory to recent developments …

We explain how the string spectrum in flat space and pp-waves arises from the large-N limit,
at fixed g 2 YM, of U (N) Script N= 4 super Yang Mills. We reproduce the spectrum by …

A bstract We study symmetries of quantum field theories involving topologically distinct
sectors of the field space. To exhibit these symmetries we define special gauge invariant …

We consider field theories with sixteen supersymmetries, which include U (N) Yang-Mills
theories in various dimensions, and argue that their large N limit is related to certain …

We construct a conformal field theory dual to string theory on AdS 3 with pure NS–NS flux. It
is given by a symmetric orbifold of a linear dilaton theory deformed by a marginal operator …

Near-extremal black holes are obtained by exciting the Ramond sector of the D1-D5 CFT,
where the ground state is highly degenerate. We find that the dual geometries for these …

We calculate the spectrum of a two dimensional CFT on a cylinder, perturbed by a general
linear combination of, and, by utilizing the relation of this problem to certain solvable single …

We present four infinite series of new quantum theories with super-Poincare symmetry in six
dimensions, which are not local quantum field theories. They have string like excitations but …