Pump free quantum transduction Part II

Quantum transduction—the coherent conversion of quantum information between microwave and optical domains—is a key capability for linking superconducting quantum systems across long distances. However, conventional transduction approaches that rely on strong optical pumping introduce significant thermal noise, limiting fidelity. To address this challenge, we propose a pump-free quantum transduction scheme supported by a feasible device design. Our hybrid platform integrates a diamond color center with a superconducting microwave resonator and an optical cavity, achieving strong microwave coupling and high optical cooperativity simultaneously. The proposed system demonstrates heralding probability and fidelity that surpass current transduction protocols, paving a promising direction toward realizing pump-free quantum transduction.

This is Part II of a two-part talk. In this talk, we will go through feasible device design and the performance of the device.