An electro-opto-mechanical transducer implementation for downconversion of squeezed states of light

Creating an entangled network of superconducting quantum nodes connected by optical links is a major goal in the fields of quantum computing and networking. Towards this goal, different quantum transducer platforms are the focus of ongoing optimization across multiple inter-connected figures of merit. Our device uses a macroscopic mechanical mode of a Si₃N₄ membrane as an intermediary, to couple a superconducting LC circuit to a high finesse optical Fabry-Perot cavity for carrying out efficient and low noise frequency conversion across 5 orders of magnitude. Here, we present our ongoing experimental progress towards operating one of these converter devices with the goal of connecting a squeezed light source to the optical input, and preserving the quantum correlations after conversion to microwave frequencies.