Description:

Superconducting circuits have emerged as a powerful analog quantum simulation platform for exploring many-body physics in synthetic quantum matter. In this talk, I will present recent experiments that advance our ability to both control and probe quantum correlations in these systems. We begin with a programmable superradiance experiment, where engineered collective coupling between an interacting superconducting-qubit array and a microwave waveguide allows us to realize tunable bright and dark states and directly observe qubit dynamics and correlations throughout the superradiant decay, enabling future explorations in many-body quantum optics. I will then discuss experiments that use engineered local driven-dissipative baths to study quantum transport in a circuit Bose-Hubbard lattice via in-situ measurements of particle current. Using the same baths, we also demonstrate site-resolved tunneling spectroscopy for probing many-body states. Together, these capabilities open the door to using programmable coherent and dissipative interactions to generate robust quantum correlations and entangled quantum resources.

Bio: Alex Ruichao Ma received his Ph.D. in Physics from Harvard University in 2014, where he studied many-body physics using ultracold atoms in optical lattices. From 2015 to 2019, he worked on superconducting qubits for quantum simulation as a Kadanoff-Rice Postdoctoral Fellow at the James Franck Institute, University of Chicago. In 2019, Alex joined Purdue University as an Assistant Professor in the Department of Physics and Astronomy. His experimental group focuses on quantum many-body physics and quantum information science using superconducting circuits. He is a recipient of the NSF CAREER Award in 2022.

Ruichao (Alex) Ma, Assistant Professor, Purdue University

Host: Enectali Figueroa-Feliciano