Achieving scalable quantum advantage in bosonic sensing and transduction in the presence of loss and noise

A microwave-optical quantum transducer interconnects the superconducting qubits and the optical communication photons, thereby enabling quantum microwave-photonics, and distributed quantum sensing and computing. However, the conversion efficiency is low due to the intrinsically weak nonlinear interaction between photons. In this seminar, I will introduce an intraband-entanglement-assisted protocol to enhance the efficiency, up to 100% for an arbitrarily low unassisted efficiency with sufficiently strong entanglement. Then based on such entanglement-assisted protocol, I will present my recent progress on microwave-optical transduction, dark matter search, and absorption spectroscopy. Specifically, I propose practical protocols using off-the-shelf devices, e.g. two-mode squeezing and photon detectors, to achieve scalable quantum advantages robust to loss. Finally, without the need of an entanglement ancilla, I present a near-term application of entanglement in dual-comb spectroscopy, which can enable a 13dB advantage in SNR even with experiment noises considered in simulation. In each of the presented scenarios, entanglement yields quantum advantages scalable with squeezing strength over classical protocols.

Dr. Shi is a postdoc in the Ming Hsieh Department of Electrical and Computer Engineering at University of Southern California. With a research focus on engineering theory of photonic quantum sensing and transduction, Shi has contributed to the field through multiple NSF and DARPA funded projects, e.g. MeasQuIT and INSPIRED.

He earned a Ph.D. in Electrical Engineering from University of Southern California and has since been actively engaged in mentoring students and research collaborations. Shi’s work has been published in 18 papers on prestigious journals, e.g. Physical Review Letters and npj Quantum Information, including multiple collaborations with experiment groups in the Center of Quantum Networks and the Superconducting Quantum Materials and Systems Center led by Fermilab.

Beyond research, Shi is passionate about bridging the gap between academia and real-world applications. He looks forward to discussing possible killer applications of entanglement and engaging in meaningful academic exchange.