在量子密码学中用于CMOSSi光倍增器检测速率的新数学框架
1Faculty of Electrical and Computer Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
Sensors (Basel, Switzerland)
|February 27, 2026
概括
光倍增器 (SiPMs) 克服了量子密码学中探测器死亡时间的限制. 这一进步使得数据中心中量子密钥分布的安全密钥率更高.
科学领域:
- 量子信息科学 量子信息科学
- 光子学和光电学和光电子学.
- 密码学 密码学 密码学 密码学
背景情况:
- 离散变量量子密钥分布 (DV-QKD) 的部署受到高流量网络中单光子探测器和的限制.
- 目前的解决方案,如CMOS单光子雪崩二极管 (SPAD),由于检测器死亡时间,具有安全密钥速率 (SKR) 的限制.
研究的目的:
- 为光倍增器 (SiPMs) 推导一个通用的检测速率模型,以解决千兆赫兹速率量子密码学中死时瓶的问题.
- 量化SiPM数组中被动空间复杂化的好处,用于量子通信.
主要方法:
- 开发了对模拟 (可) 和数字 (不可) SiPM架构的精确检测速率模型.
- 整合到模型中的相关噪声源,如光学交叉声和后脉冲.
- 专注于最大化检测计数率,与能量分辨率或非线性响应模型形成对比.
主要成果:
- SiPM可以显著提高检测率,超过单个SPAD超过一个数量级.
- 衍生模型为理解量子加密系统中的SiPM性能提供了一种通用方法.
- 在SiPM数组中被动空间复杂化提供了一种可行的策略,以减轻截止时间限制.
结论:
- 在DV-QKD系统中,SiPM为克服探测器死时间瓶提供了一个有希望的解决方案.
- 开发的检测速率模型对于优化SiPM在高速量子通信中的性能至关重要.
- 这项研究为在苛刻的网络环境中更强大,更有效的量子密钥分配铺平了道路.
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