Zeptosecond-Scale Single-Photon Gyroscope

IF 4.4 Q1 OPTICS Advanced quantum technologies Pub Date : 2024-07-08 DOI:10.1002/qute.202400166

Fabrizio Sgobba, Danilo Triggiani, Vincenzo Tamma, Paolo De Natale, Gianluca Gagliardi, Saverio Avino, Luigi Santamaria Amato

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Abstract

This work presents an all-fiber telecom-range optical gyroscope employing a spontaneous parametric down conversion crystal to produce ultra-low intensity thermal light by tracing-out one of the heralded photons. The prototype exhibits a detection limit on photon delay measurements of 249 zs over a 72 s averaging time and 26 zs in differential delay measurements at $t = 10^{4}$ s averaging. The detection scheme proves to be the most resource-efficient possible, saturating $> 99.5 %$ of the Cramér–Rao bound. These results are groundbreaking in the context of low-photon regime quantum metrology, paving the way to novel experimental configurations to bridge quantum optics with special or general relativity.

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七秒级单光子陀螺仪

这项研究提出了一种全光纤电信范围光学陀螺仪，它采用自发参量向下转换晶体，通过追踪出一个预示光子来产生超低强度热光。原型机在 72 秒平均时间内的光子延迟测量中显示出 249 zs 的探测极限，在秒平均时间内的差分延迟测量中显示出 26 zs 的探测极限。检测方案被证明是最节省资源的，达到了克拉梅尔-拉奥约束的饱和。这些结果在低光子制度量子计量学方面具有开创性意义，为新型实验配置铺平了道路，从而在量子光学与狭义或广义相对论之间架起了桥梁。

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来源期刊

Advanced quantum technologies

CiteScore

7.90

自引率

0.00%

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