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arXiv 2002.04944quant-ph
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实验性三态非特征源的与测量设备无关的量子密钥分发

Experimental Three-State Measurement-Device-Independent Quantum Key Distribution with Uncharacterized Sources

Xing-Yu Zhou, Hua-Jian Ding, Chun-Hui Zhang, Jian Li, Chun-Mei Zhang, Qin Wang

摘要:

与测量设备无关的量子密钥分发(MDI-QKD)协议以其高度的安全性和实用性在量子通信中发挥着重要作用。它可以免疫所有针对检测设备的侧信道攻击。然而,在大多数现有的MDI-QKD方案中,该协议在状态准备期间仍然包含严格的要求,例如,完美的状态准备或完美表征的源,这在实践中很难实现。在这封信中,我们研究了未表征的MDI-QKD利用三态方法,大大减少了有限尺寸效应。态制备的唯一要求是在二维希尔伯特空间中制备态。此外,还实现了超过170公里传输距离的原理验证演示,这是有记录以来相同安全级别下的最长传输距离。

英文摘要:

The measurement-device-independent quantum key distribution (MDI-QKD) protocol plays an important role in quantum communications due to its high level of security and practicability. It can be immune to all side-channel attacks directed on the detecting devices. However, the protocol still contains strict requirements during state preparation in most existing MDI-QKD schemes, e.g., perfect state preparation or perfectly characterized sources, which are very hard to realize in practice. In this letter, we investigate uncharacterized MDI-QKD by utilizing a three-state method, greatly reducing the finite-size effect. The only requirement for state preparation is that the state are prepared in a bidimensional Hilbert space. Furthermore, a proof-of-principle demonstration over a 170 km transmission distance is achieved, representing the longest transmission distance under the same security level on record.

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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