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We discuss some general properties of “defect branes”, i.e. branes of co-dimension two, in (toroidally compactified) IIA/IIB string theory. In particular, we give a full classification of the supersymmetric defect branes in dimensions 3⩽D⩽10 as well as their higher-dimensional string and M-theory origin as branes and a set of “generalized” Kaluza–Klein monopoles. We point out a relation between the...
Certain AdS black holes are “fragile”, in the sense that, if they are deformed excessively, they become unstable to a fundamental non-perturbative stringy effect analogous to Schwinger pair-production [of branes]. Near-extremal topologically spherical AdS–Kerr black holes, which are natural candidates for string-theoretic models of the very rapidly rotating black holes that have actually been observed...
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