2025-03-19 カリフォルニア工科大学（Caltech）
＜関連情報＞
- https://www.caltech.edu/about/news/low-noise-transducers-to-bridge-the-gap-between-microwave-and-optical-qubits
- https://www.nature.com/articles/s41565-025-01874-8
シリコンナノメカニクスによる量子化可能なマイクロ波から光への伝導 Quantum-enabled microwave-to-optical transduction via silicon nanomechanics
Han Zhao,William David Chen,Abhishek Kejriwal & Mohammad Mirhosseini
Nature Technology Published:13 March 2025
DOI:https://doi.org/10.1038/s41565-025-01874-8
Abstract
An interface between microwave and optical photons offers the potential to network remote superconducting quantum processors. To preserve fragile quantum states, a microwave-to-optical transducer must operate efficiently in the quantum-enabled regime by generating less than one photon of noise referred to its input. Here we achieve these criteria using an integrated electro-optomechanical device made from crystalline silicon. Our platform eliminates the need for heterogeneous integration with piezoelectric materials by utilizing electrostatic actuation of gigahertz-frequency nanomechanical oscillators. Leveraging the ultra-low mechanical dissipation in silicon, our microwave-to-optical transducers achieve below one photon of input-referred added noise (nadd = 0.58) under continuous-wave laser drives. This demonstration of continuous quantum-enabled microwave-to-optical transduction improves the upconversion rate by about two orders of magnitude beyond the state of the art (R = 0.47–1.9 kHz). The increased transduction rate and scalable fabrication of our devices may facilitate near-term use of transducers in distributed quantum computers and quantum networks.
