Besides the familiar D-branes, string theory contains a vast number of other non-perturbative
objects. While a complete classification is lacking, many of these objects are related to each …

We give a survey of the present status of the microstate geometries called superstrata.
Superstrata are smooth, horizonless solutions of six-dimensional supergravity that represent …

The black-hole information paradox provides one of the sharpest foci for the conflict between
quantum mechanics and general relativity and has become the proving-ground of would-be …

A bstract We construct the first example of a superstratum: a class of smooth horizonless
supergravity solutions that are parameterized by arbitrary continuous functions of (at least) …

The black-hole information paradox provides a stringent test of would-be theories of
quantum gravity. String theory has made significant progress toward a resolution of this …

A bstract We obtain the largest families constructed to date of\(\frac {1}{8}\)-BPS solutions of
type IIB supergravity. They have the same charges and mass as supersymmetric D1-D5-P …

A bstract The entropy of the three-charge NS5-F1-P black hole in Type IIA string theory
comes from the breaking of N 1 F1 strings into N 1 N 5 little strings, which become …

A bstract We construct a new class of smooth horizonless microstate geometries of the
supersymmetric D1-D5-P black hole in type IIB supergravity. We first work in the AdS 3× S 3 …

A bstract We comment on a recent paper of Almheiri, Marolf, Polchinski and Sully who argue
against black hole complementarity based on the claim that an infalling observer 'burns' as …

We give a broad conceptual review of what we have learned about black holes and their
microstate structure from the study of microstate geometries and their string theory limits. We …