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相关实验视频

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Implementation of a Reference Interferometer for Nanodetection
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使用超导纳米线阵列的千兆赫兹检测速率和动态光子数分辨率.

Giovanni V Resta1,2, Lorenzo Stasi1,2, Matthieu Perrenoud1

  • 1Group of Applied Physics, University of Geneva, Rue de l'Ecole-de-Médecine 20, CH-1211 Genève, Switzerland.

Nano letters
|June 23, 2023
PubMed
概括

这项研究介绍了一种用于量子光学的14像素超导纳米线单光子探测器 (SNSPD) 阵列. 该阵列实现了高检测效率,并展示了用于量子信息处理的先进光子数分辨率.

关键词:
对于SNSPDs来说,这是一个很大的问题.高的检测率,高的检测率.光子数分辨率的分辨率是什么量子通信是一种量子通信.量子计算是一种量子计算.单光子探测器是一个光子探测器.

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科学领域:

  • 量子光学是一种量子光学.
  • 光子学 是一个光子学.
  • 超导装置的超导器件

背景情况:

  • 超导纳米线单光子探测器 (SNSPD) 对于量子光学至关重要,因为它具有高系统探测效率 (SDE),低暗数和快速恢复.
  • 量子计算和通信方面的进步需要更快的探测器,具有光子数分解能力.

研究的目的:

  • 开发和描述一个SNSPD数组,以提高量子信息应用的性能.
  • 为了证明数组的动态光子数分辨率,以准确地重建状态.

主要方法:

  • 制造一个14个独立像素的SNSPD阵列.
  • 在电信频段中测量SDE.
  • 每个像素的独立读数,以实现高检测率.
  • 利用动态光子数分辨率用于状态重建.

主要成果:

  • 在电信频段实现了90%的SDE.
  • 证明了1.5 GHz光子检测,绝对SDE为45%.
  • 为各种光输入,包括长脉冲,展示了准确的状态重建.
  • 获得了光纤合SNSPD的最先进的两光子 (74%) 和三光子 (57%) 忠实度.

结论:

  • 开发的SNSPD阵列在检测速度和光子数分辨率方面提供了显著的改进.
  • 这项技术推进了线性光学量子计算,准确定性单光子源和量子重复器的可行性.
  • 阵列的性能代表了迈向实际量子通信和计算系统的关键一步.