近日，美国耶鲁大学的Hong X. Tang及其研究团队取得一项新进展。经过不懈努力，他们对微波-光量子转导的行波电光学进行研究。相关研究成果已于2024年4月16日在国际知名学术期刊《物理评论A》上发表。

本文对行波几何中微波光转换过程的动力学进行了进一步的理论研究。在此基础上，研究人员提出了一种转换效率接近1、转换频率可调的行波电光换能器设计。

据悉，高效的微波光量子转导对于量子网络和分布式量子计算至关重要。基于腔的电光换能器由于其腔增强的转换效率而得到了广泛的研究，尽管其代价是有限的转导带宽和微波与光学模式之间严格的频率校准要求。一米长的超导电光调制器(SEOM)的最新进展表明，其转换效率已接近基于腔的行波结构换能器，同时能够保持数十千兆赫的宽带特性。

附：英文原文

Title: Traveling-wave electro-optics for microwave-to-optical quantum transduction

Author: Mohan Shen, Manuel C. C. Pace, Hong X. Tang

Issue&Volume: 2024/04/16

Abstract: High-efficiency microwave-to-optical quantum transduction is crucial for quantum networks and distributed quantum computing. Cavity-based electro-optic transducers have been widely explored due to their cavity-enhanced conversion efficiency, albeit at the compromise of limited transduction bandwidth and strict frequency alignment requirements between microwave and optical modes. A recent advancement in meter-long superconducting electro-optic modulators (SEOM) has demonstrated conversion efficiency approaching that of the cavity-based transducers on a traveling-wave structure while maintaining a broad bandwidth of tens of gigahertz. This paper provides a further theoretical investigation into the dynamics of the microwave-to-optical conversion process in a traveling-wave geometry. Based on this analysis, we propose a traveling-wave electro-optic transducer design featuring near-unity conversion efficiency and tunable conversion frequency.

DOI: 10.1103/PhysRevA.109.043515

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.109.043515