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Colloquium

Speaker: Alex Ruichao Ma, Asst. Professor, Physics & Astronomy, Purdue University Location: LD 010

"Exploring Synthetic Quantum Matter in Superconducting Circuits"

Abstract:  Superconducting circuits have emerged as a competitive platform for quantum computation, satisfying the challenges of controllability, long coherence and strong interactions. Here we apply this toolbox to the exploration of strongly correlated quantum materials made of microwave photons. I will present our recent results on a new approach for preparing photonic many-body phases, where engineered dissipation is used as a resource to protect the fragile quantum states against intrinsic losses [1]. We build a strongly interacting Bose-Hubbard lattice and realize a dissipatively stabilized Mott insulator of photons. The dynamics of thermalization towards the Mott phase is probed using lattice-site- and time-resolved microscopy. In a separate experiment, we create Chern insulator lattices for microwave photons and observe topologically protected edge states [2]. Our experiments demonstrate superconducting circuits as a powerful platform for studying quantum materials, and I will briefly discuss our future directions including the exploration of strongly interacting topological phases, and quantum thermodynamics.

Refreshments at 3:00 pm in the Physics Conference Room LD 154B