Interference between independent photonic integrated devices for quantum key distribution.
Interference between independent photonic integrated devices for quantum key distribution.
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DOI：
10.1364/ol.44.000275
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发表时间：
2019-01
期刊：
影响因子：
3.6
通讯作者：
Henry Semenenko;P. Sibson;M. Thompson;C. Erven
中科院分区：
文献类型：
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作者：
Henry Semenenko;P. Sibson;M. Thompson;C. Erven
量子计算的进步是对现代密码学的快速增长的威胁。量子密钥分发（QKD）提供了长期的安全性，而无需假设对手的计算能力。然而，理论和实验之间的不一致性在现实世界的安全性方面提出了问题，而大型和耗电的商业系统已经减缓了大规模采用。测量设备无关的QKD（MDI-QKD）提供了一种共享密钥的方法，该方法消除了所有可能的检测器侧信道攻击，从而大大提高了安全性。在这封信中，我们实验证明了一个关键的步骤，需要执行MDI-QKD与可扩展的集成设备。在431 MHz的频率下，用两个独立的磷化铟发射器刻出弱相干态，在可见度为46.5± 0.8%的条件下，得到了Hong-Ou-Mandel干涉。这封信展示了使用集成设备降低在城域网中采用QKD的主要障碍的可行性。
Advances in quantum computing are a rapidly growing threat towards modern cryptography. Quantum key distribution (QKD) provides long-term security without assuming the computational power of an adversary. However, inconsistencies between theory and experiment have raised questions in terms of real-world security, while large and power-hungry commercial systems have slowed wide-scale adoption. Measurement-device-independent QKD (MDI-QKD) provides a method of sharing secret keys that removes all possible detector side-channel attacks which drastically improves security claims. In this Letter, we experimentally demonstrate a key step required to perform MDI-QKD with scalable integrated devices. We show Hong-Ou-Mandel interference between weak coherent states carved from two independent indium phosphide transmitters at 431 MHz with a visibility of 46.5±0.8%. This Letter demonstrates the feasibility of using integrated devices to lower a major barrier towards the adoption of QKD in metropolitan networks.