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Department of Physics and Physical Oceanography Colloquium Non-equilibrium physics of quantum materials Alexander Kemper, North Carolina State University Quantum materials have already become intrinsic elements in "futuristic" materials of today: LEDs, flexible displays, and MRI machines all use quantum materials, and the potential for future applications is infinite. To be able to use them to their full potential, we first need to understand their electronic properties both in and out of equilibrium. A powerful emerging method for doing so is perturbing the system into a non-equilibrium state and examining the subsequent temporal dynamics, which often exhibit oscillations and decay reflecting the underlying physics. This technique is rapidly growing in use, and has many exciting capabilities for both understanding and controlling quantum materials, but still needs a solid theoretical footing. In this talk, I will discuss several theoretical achievements regarding pump-probe spectroscopy of quantum materials. Using a variety of techniques, I will illustrate the capabilities of the non-equilibrium approach in measuring the equilibrium state of the material and discuss how important insights can be gained from “movies” the experiments produce. I will also show how the interaction of the pump with the material can induce new phases of matter, which are otherwise not accessible in equilibrium. Friday, March 4, 2016 2:00 PM DeLoach Hall, Room 212 Refreshments will be served at 1:50 PM