Holographic horizons

NEW HORIZONS New horizons in osteoarthritis

Osteoarthritis (OA) is the most common type of arthritis worldwide and rapidly increasing with ageing populations. It is a major source of pain and disability for individuals and economic burden for health economies. Modern imaging, in particular magnetic resonance imaging (MRI), has helped us to understand that OA is a dynamic remodelling process involving all the structures within the joint. ...

A Multi-boundary AdS Orbifold and DLCQ Holography: A Universal Holographic Description of Extremal Black Hole Horizons

We examine a stationary but non-static asymptotically AdS3 spacetime with two causally connected conformal boundaries, each of which is a “null cylinder”, namely a cylinder with a null direction identified. This spacetime arises from three different perspectives: (i) as a non-singular, causally regular orbifold of global AdS3 by boosts, (ii) as a Penrose-like limit focusing on the horizon of ex...

Expanding horizons

Enhanced Horizons

Half-supersymmetric geometries of N = 2 five-dimensional gauged supergravity have recently been fully classified using spinorial geometry techniques. We use this classification to determine all possible regular halfsupersymmetric near-horizon geometries, assuming that all of the gaugeinvariant spinor bilinears are regular at the horizon. Four geometries are found, two of which have been found p...

Wavy Horizons?

We describe the application of a gravity wave-generating technique to certain higher dimensional black holes. We find that the induced waves generically destroy the event horizon producing parallelly propagated curvature singularities. Based on a talk presented at the Seventh Canadian Conference on General Relativity and Relativistic Astrophysics in Calgary, AB, Canada, May 31 – June 7, 1997. E...