中国物理B ›› 2017, Vol. 26 ›› Issue (11): 110304-110304.doi: 10.1088/1674-1056/26/11/110304
Balancing four-state continuous-variable quantum key distribution with linear optics cloning machine
Xiao-Dong Wu(吴晓东), Qin Liao(廖骎), Duan Huang(黄端), Xiang-Hua Wu(吴湘华), Ying Guo(郭迎)
- 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
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
摘要： 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.
中图分类号: (Quantum information)
- 03.67.-a