The wide applications of higher dimensional gravity and gauge/gravity duality have fuelled
the search for new stationary solutions of the Einstein equation (possibly coupled to matter) …

A comprehensive overview of holographic methods in quantum matter, written by pioneers
in the field. This book, written by pioneers in the field, offers a comprehensive overview of …

We present a wormhole solution in four dimensions. It is a solution of an Einstein Maxwell
theory plus charged massless fermions. The fermions give rise to a negative Casimir-like …

A bstract We study systems in 2+ 1 dimensions consisting of defects that source an electric
charge, or a magnetic flux, of a U (1) field, and we use holography to compute their effects …

A surprising connection between the weak gravity conjecture and cosmic censorship has
recently been proposed. In particular, it was argued that a promising class of …

A bstract We study the spectrum of local operators living on a defect in a generic conformal
field theory, and their coupling to the local bulk operators. We establish the existence of …

A bstract We investigate the geometry near the horizon of a generic, four-dimensional
extremal black hole. When the cosmological constant is negative, we show that (in almost all …

A bstract We study monodromy defects in O (N) symmetric scalar field theories in d
dimensions. After a Weyl transformation, a monodromy defect may be described by placing …

We consider time-dependent solutions of the Einstein-Maxwell equations using anti–de
Sitter (AdS) boundary conditions, and provide the first counterexample to the weak cosmic …

We summarize our work on spherically symmetric midi-superspaces in loop quantum
gravity. Our approach is based on using inhomogeneous slicings that may penetrate the …