Professor Fertig is interested in the theoretical physics of low dimensional condensed matter systems. These include the two-dimensional electron gas, which supports an amazingly broad variety of phenomena and states: the quantum Hall effect, metal-insulator transitions, electron crystals, highly correlated metals, striped states, and quantum ferromagnetism. Very recently he has been studying the electronic properties of graphene, a new two-dimensional material in which the electrons behave as massless relativistic particles, leading to bizarre, fascinating, and possible useful properties. In addition, Prof. Fertig's research includes studies of superconductivity (particularly unusual properties associated with vortex excitations) and the physics of cold atoms.