Subir Sachdev is Professor of Physics at Harvard University. He also has a visiting appointment as Distinguished Research Chair at the Perimeter Institute for Theoretical Physics. He obtained his Ph.D. from Harvard in 1985. His research has focused on a variety of quantum materials, and especially on their quantum phase transitions. He was an early proponent of using ideas based on quantum criticality to describe the phase diagram of the cuprate superconductors. He is the author of the book Quantum Phase Transitions (Cambridge University Press,1999). In recent years, he has applied the AdS/CFT correspondence to describe strongly interacting phases of quantum matter.