Seminar By Babak Seradjeh, Indiana University

Title: Floquet Topology and Many-Body Dynamics in Quantum Matter

Series: Condensed Matter Sciences Seminar

Host: Hitesh Changlani

Abstract: Periodic driving can generate interactions in quantum systems that are absent in static settings. This “Floquet engineering” has been demonstrated across different platforms, including cold atoms in optical lattices, trapped ions, photonic devices, and solid-state systems, offering precise in situ control for realizing and probing novel quantum phases of matter. In this talk, I will present our recent work in this area. First, we propose using twisted light to generate and control multiple topological phases in graphene. Second, we study the steady-state population of driven systems weakly coupled to a fermionic bath, and use these results to derive a “Josephson Floquet sum rule” for driven superconductors. Time permitting, I will also discuss our ongoing work on simulating quantum magnetism in spin-1 Hamiltonians by driving the rotational states of trapped dipolar molecules with circularly polarized microwaves.