Abstract
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 . This Letter demonstrates the feasibility of using integrated devices to lower a major barrier towards the adoption of QKD in metropolitan networks.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
C. Agnesi, B. Da Lio, D. Cozzolino, L. Cardi, B. Ben Bakir, K. Hassan, A. Della Frera, A. Ruggeri, A. Giudice, G. Vallone, P. Villoresi, A. Tosi, K. Rottwitt, Y. Ding, and D. Bacco
Opt. Lett. 44(2) 271-274 (2019)
Chao Wang, Shuang Wang, Zhen-Qiang Yin, Wei Chen, Hong-Wei Li, Chun-Mei Zhang, Yu-Yang Ding, Guang-Can Guo, and Zheng-Fu Han
Opt. Lett. 41(23) 5596-5599 (2016)
Donghwa Lee, Seongjin Hong, Young-Wook Cho, Hyang-Tag Lim, Sang-Wook Han, Hojoong Jung, Sung Moon, Kwang Jo Lee, and Yong-Su Kim
Opt. Lett. 45(9) 2624-2627 (2020)