Holographic duality (or the AdS/CFT correspondence), originally proposed by Maldacena in 1998, is arguably the most important theoretical development in physics in the past decade. Originally discovered in string theory, it has since been rolled out over much of modern fundamental physics with the goal of shedding light on strongly interacting many-body systems. It has yielded new insights in a wide variety of subjects, from general relativity to hydrodynamics.
A high profile example was the description of transport properties of the quark-gluon plasma, one of the main motivations of the experimental program in the Large Hadron Collider and Holographic Duality: How Black Holes Illuminate Intractable Problems previously in the Relativistic Heavy Ion Collider. Results from the holographic principle, though semi-quantitative (the holographic dual of quantum chromodynamics is not yet known), are particularly valuable because this problem cannot be tackled by any other technique. The 2013 Mathematics and Physics of the Holographic Principle (HOL) programme at the Isaac Newton Institute was conceived to exploit recent developments in this exciting field. It