title: An improved scheme on decoy-state method for measurement-device-independent quantum key distribution.
abstract: Quantum key distribution involving decoy-states is a significant application of quantum information. By using three-intensity decoy-states of single-photon-added coherent sources, we propose a practically realizable scheme on quantum key distribution which approaches very closely the ideal asymptotic case of an infinite number of decoy-states. We make a comparative study between this scheme and two other existing ones, i.e., two-intensity decoy-states with single-photon-added coherent sources, and three-intensity decoy-states with weak coherent sources. Through numerical analysis, we demonstrate the advantages of our scheme in secure transmission distance and the final key generation rate.
authors.affiliation: Institute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.|Key Lab of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education, Nanjing 210003, China.|Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China.|Synergetic Innovation Center of Quantum Information &Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Wang
authors.affiliation: Institute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.|Key Lab of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education, Nanjing 210003, China.|Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China.|Synergetic Innovation Center of Quantum Information &Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Mo
authors.initials: M
authors.lastname: Li
authors.affiliation: Institute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.|Key Lab of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education, Nanjing 210003, China.|Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China.|Synergetic Innovation Center of Quantum Information &Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Guang-Can
authors.initials: GC
authors.lastname: Guo
authors.affiliation: Institute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.|Key Lab of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education, Nanjing 210003, China.|Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Wang