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arXiv 2406.03047cond-mat.mes-hallphysics.app-phquant-ph
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高灵敏度微波光子探测:腔耦合双量子点实现单腔光子灵敏度

High-efficiency microwave photodetection by cavity coupled double dots with single cavity-photon sensitivity

Lund University(隆德大学);Indian Institute of Technology Kanpur(坎普尔印度理工学院);University of Basel(巴塞尔大学)

Subhomoy Haldar, Harald Havir, Waqar Khan, Drilon Zenelaj, Patrick P. Potts, Sebastian Lehmann, Kimberly A. Dick, Peter Samuelsson, Ville F. Maisi

AI总结:

本文提出一种超导腔耦合双量子点光电二极管,实现25%的光电转换效率,可探测低至100 aW的微波信号并具备单光子灵敏度,为微波光子统计和量子信息处理提供关键进展。

摘要:

我们展示了一种超导腔耦合双量子点(DQD)光电二极管,在微波频段实现了最大光子-电子转换效率达25%。通过采用更高品质因数的腔体以及改进器件设计以防止光子通过非预期路径泄漏,我们的器件能够测量低至100 aW功率水平的微波信号,并实现对腔内单个光子逐一探测微波信号的灵敏度。我们利用Jaynes-Cummings输入-输出理论分析了光电二极管的工作机制,识别出实现接近统一光电探测效率所需的关键改进,即更强的腔-DQD耦合。本工作所呈现的结果代表了向接近统一的微波光电探测效率及单腔光子灵敏度迈进的关键一步,这对于微波频段光子统计研究及量子信息处理相关应用具有重要意义。

英文摘要:

We present a superconducting cavity-coupled double quantum dot (DQD) photodiode that achieves a maximum photon-to-electron conversion efficiency of 25% in the microwave domain. With a higher-quality-factor cavity and improved device design to prevent photon leakages through unwanted pathways, our device measures microwave signals down to 100 aW power level and achieves sensitivity to probe microwave signals with one photon at a time in the cavity. We analyze the photodiode operation using Jaynes-Cummings input-output theory, identifying the key improvements of stronger cavity-DQD coupling needed to achieve near-unity photodetection efficiency. The results presented in this work represent a crucial advancement toward near unity microwave photodetection efficiency with single cavity-photon sensitivity for studies of photon statistics in the microwave range and applications related to quantum information processing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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