dorsal/arxiv
View SchemaSimulation and Implementation of Decoy State Quantum Key Distribution over 60km Telecom Fiber
| Authors | Yi Zhao, Bing Qi, Xiongfeng Ma, Hoi-Kwong Lo, Li Qian |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0601168 |
| URL | https://arxiv.org/abs/quant-ph/0601168 |
| DOI | 10.1109/ISIT.2006.261920 |
| Journal | Proceedings of IEEE International Symposium on Information Theory 2006, pp. 2094-2098 |
Abstract
Decoy state quantum key distribution (QKD) has been proposed as a novel approach to improve dramatically both the security and the performance of practical QKD set-ups. Recently, many theoretical efforts have been made on this topic and have theoretically predicted the high performance of decoy method. However, the gap between theory and experiment remains open. In this paper, we report the first experiments on decoy state QKD, thus bridging the gap. Two protocols of decoy state QKD are implemented: one-decoy protocol over 15km of standard telecom fiber, and weak+vacuum protocol over 60km of standard telecom fiber. We implemented the decoy state method on a modified commercial QKD system. The modification we made is simply adding commercial acousto-optic modulator (AOM) on the QKD system. The AOM is used to modulate the intensity of each signal individually, thus implementing the decoy state method. As an important part of implementation, numerical simulation of our set-up is also performed. The simulation shows that standard security proofs give a zero key generation rate at the distance we perform decoy state QKD (both 15km and 60km). Therefore decoy state QKD is necessary for long distance secure communication. Our implementation shows explicitly the power and feasibility of decoy method, and brings it to our real-life.
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"abstract": "Decoy state quantum key distribution (QKD) has been proposed as a novel\napproach to improve dramatically both the security and the performance of\npractical QKD set-ups. Recently, many theoretical efforts have been made on\nthis topic and have theoretically predicted the high performance of decoy\nmethod. However, the gap between theory and experiment remains open. In this\npaper, we report the first experiments on decoy state QKD, thus bridging the\ngap. Two protocols of decoy state QKD are implemented: one-decoy protocol over\n15km of standard telecom fiber, and weak+vacuum protocol over 60km of standard\ntelecom fiber. We implemented the decoy state method on a modified commercial\nQKD system. The modification we made is simply adding commercial acousto-optic\nmodulator (AOM) on the QKD system. The AOM is used to modulate the intensity of\neach signal individually, thus implementing the decoy state method. As an\nimportant part of implementation, numerical simulation of our set-up is also\nperformed. The simulation shows that standard security proofs give a zero key\ngeneration rate at the distance we perform decoy state QKD (both 15km and\n60km). Therefore decoy state QKD is necessary for long distance secure\ncommunication. Our implementation shows explicitly the power and feasibility of\ndecoy method, and brings it to our real-life.",
"arxiv_id": "quant-ph/0601168",
"authors": [
"Yi Zhao",
"Bing Qi",
"Xiongfeng Ma",
"Hoi-Kwong Lo",
"Li Qian"
],
"categories": [
"quant-ph"
],
"doi": "10.1109/ISIT.2006.261920",
"journal_ref": "Proceedings of IEEE International Symposium on Information Theory\n 2006, pp. 2094-2098",
"title": "Simulation and Implementation of Decoy State Quantum Key Distribution over 60km Telecom Fiber",
"url": "https://arxiv.org/abs/quant-ph/0601168"
},
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