I work on holographic models of strongly-correlated systems, such as high-Tc superconductors. These models have arisen from developments in string theory and my background and continued interest in this subject has allowed me to develop new rigorous models of holographic condensed-matter physics starting from first principles. Recently I have been particularly interested in out-of-equilibrium situations, which, besides being an extremely important and promising area, are great fun to work on, since their solution likely needs a host of different techniques and insights from all parts of physics.