Floquet Topology and Nonequilibrium Dynamics in Quantum Matter
Abstract: Periodic driving can generate new interactions in quantum systems that are absent in the static system. Such “Floquet engineering” has been employed and demonstrated in various platforms, such as cold atoms in optical lattices, trapped ions, photonic devices, and solid-state systems, promising exquisite in-situ control for realizing and probing novel quantum phases of matter. In this talk, I will present our recent theoretical works in this area: first, on using twisted light to generate and control multiple topological phases in graphene; second, on the steady-state population of driven systems weakly coupled to a fermionic bath. I will use the latter to show a “Josephson Floquet sum rule” for driven superconductors.
Bio: Babak Seradjeh is a theoretical physicist interested in quantum dynamics in condensed matter and AMO systems. He is especially interested in nonequilibrium dynamics and topology in many-body systems and quantum field theories. He obtained his PhD in 2006 at Simon Fraser University for work on high-temperature superconductivity in cuprates. After postdoctoral fellowships at the University of British Columbia and the University of Illinois at Urbana-Champaign, he joined Indiana University in 2011. He received the NSF CAREER award in 2014 and was a Guest Scientist at the Max-Planck Institute for the Physics of Complex Systems in Dresden.
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