Harvard Condensed Matter Theory Seminars

Yong-Baek Kim, University of Toronto & Harvard.

Nonequilibrium quantum criticality in open electronic systems

Theory of equilibrium quantum phase transitions has been around for a while, but quantum phase transitions in systems driven out of equilibrium have not been studied much. Here I will present a theory of nonequilibrium quantum criticality in open (coupled to reservoirs) electronic systems. I will discuss the cases of itinerant Ising and Heisenberg magnets with nonequilibrium provided by current flow across the system. Both departures from equilibrium at conventional (equilibrium) quantum critical points and the physics of phase transitions induced by the nonequilibrium drive will be discussed.

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Harvard Physics Department