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Balancing four-state continuous-variable quantum key distribution with linear optics cloning machine |
| Xiao-Dong Wu(吴晓东)1, Qin Liao(廖骎)1, Duan Huang(黄端)1,2, Xiang-Hua Wu(吴湘华)1, Ying Guo(郭迎)1,3 |
1. School of Information Science and Engineering, Central South University, Changsha 410083, China;
2. State Key Laboratory of Advanced Optical Communication Systems and Networks, Center of Quantum Information Sensing and Processing, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
3. School of Engineering and Information Technology, University of New South Wales, Canberra, ACT 2610, Australia |
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Abstract We show that the secret key generation rate can be balanced with the maximum secure distance of four-state continuous-variable quantum key distribution (CV-QKD) by using the linear optics cloning machine (LOCM). Benefiting from the LOCM operation, the LOCM-tuned noise can be employed by the reference partner of reconciliation to achieve higher secret key generation rates over a long distance. Simulation results show that the LOCM operation can flexibly regulate the secret key generation rate and the maximum secure distance and improve the performance of four-state CV-QKD protocol by dynamically tuning parameters in an appropriate range.
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Received: 23 February 2017
Revised: 09 August 2017
Accepted manuscript online:
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PACS:
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03.67.-a
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(Quantum information)
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03.67.Bg
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(Entanglement production and manipulation)
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03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Hk
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(Quantum communication)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61379153 and 61572529). |
Corresponding Authors:
Duan Huang, Ying Guo
E-mail: duan.huang@foxmail.com;guoyingcsu@sina.com
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Cite this article:
Xiao-Dong Wu(吴晓东), Qin Liao(廖骎), Duan Huang(黄端), Xiang-Hua Wu(吴湘华), Ying Guo(郭迎) Balancing four-state continuous-variable quantum key distribution with linear optics cloning machine 2017 Chin. Phys. B 26 110304
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