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BPS Bound States Of D0-D6 And D0-D8 Systems In A B-Field
Edward Witten
The D0-D6 system, which is not supersymmetric in the absence of a Neveu-Schwarz B-field, becomes supersymmetric if a suitable constant B-field is turned on. On one side of the supe…
The Hagedorn transition in non-commutative open string theory
Steven S. Gubser, Sergei Gukov, Igor R. Klebanov +2
The Hagedorn transition in non-commutative open string theory (NCOS) is relatively simple because gravity decouples. For NCOS theories in no more than five spacetime dimensions, th…
Overview Of K-Theory Applied To Strings
Edward Witten
K-theory provides a framework for classifying Ramond-Ramond (RR) charges and fields. K-theory of manifolds has a natural extension to K-theory of noncommutative algebras, such as t…
Noncommutative Tachyons And String Field Theory
E. Witten
It has been shown recently that by turning on a large noncommutativity parameter, the description of tachyon condensation in string theory can be drastically simplified. We reconsi…
Supersymmetric Index In Four-Dimensional Gauge Theories
Edward Witten
This paper is devoted to a systematic discussion of the supersymmetric index Tr (-1)^F for the minimal supersymmetric Yang-Mills theory -- with any simple gauge group G -- primaril…
Two Two-Dimensional Supergravity Theories from Calabi-Yau Four-Folds
S. James Gates, Sergei Gukov, Edward Witten
We consider two-dimensional supergravity theories with four supercharges constructed from compactification of Type II string theory on a generic Calabi-Yau four-fold. In Type IIA a…