Progress towards quantum transduction in a hybrid mm-wave-optical system

We present a hybrid system for coupling mm-wave and optical photons using Rubidium Rydberg atoms. The primary device is a high-Q, monolithic, superconducting cavity in a 4 K cryostat, crossed with an optical resonator and with optical access to trap and cool atoms at the center. With high quality factors of the mm-wave cavity and the strong electric dipole couplings between Rydberg states, exceptionally high single atom cooperativities are achievable. Here, we present recent developments in the experiment including the observation of mean-field optical nonlinearities due to the mm-wave cavity. We describe the integration of a high power 297 nm ultraviolet laser into the experiment and progress towards quantum transduction using this platform. We also talk about our lab's efforts in the direction of implementing interesting local and non-local hamiltonians with optical Fabry-Perot resonators.