Long-Distance Trust-Free Quantum Key Distribution

被引:19
作者
Lo Piparo, Nicolo [1 ]
Razavi, Mohsen [1 ]
机构
[1] Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England
基金
英国工程与自然科学研究理事会;
关键词
Long-distance quantum cryptography; quantum key distribution; quantum networks; quantum repeaters; ATOMIC ENSEMBLES; COMMUNICATION; REPEATERS;
D O I
10.1109/JSTQE.2014.2364129
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The feasibility of trust-free long-haul quantum key distribution (QKD) is addressed. We combine measurement-device-independent QKD, as an access technology, with a quantum repeater setup, at the core of future quantum communication networks. This will provide a quantum link none of whose intermediary nodes need to be trusted, or, in our terminology, a trust-free QKD link. As the main figure of merit, we calculate the secret key generation rate when a particular probabilistic quantum repeater protocol is in use. We assume the users are equipped with imperfect single photon sources, which can possibly emit two single photons, or laser sources to implement decoy-state techniques. We consider apparatus imperfection, such as quantum efficiency and dark count of photodetectors, path loss of the channel, and writing and reading efficiencies of quantum memories. By optimizing different system parameters, we estimate the maximum distance over which users can share secret keys when a finite number of memories are employed in the repeater setup.
引用
收藏
页码:123 / 130
页数:8
相关论文
共 34 条
[1]   Measurement-device-independent quantum key distribution with quantum memories [J].
Abruzzo, Silvestre ;
Kampermann, Hermann ;
Bruss, Dagmar .
PHYSICAL REVIEW A, 2014, 89 (01)
[2]   Quantum key distribution over probabilistic quantum repeaters [J].
Amirloo, Jeyran ;
Razavi, Mohsen ;
Majedi, A. Hamed .
PHYSICAL REVIEW A, 2010, 82 (03)
[3]  
[Anonymous], 2013, 2013 9 ASIAN CONTROL
[4]  
Azuma K., 2013, ALL PHOTONIC QUANTUM
[5]   Quantum cryptographic network based on quantum memories [J].
Biham, E ;
Huttner, B ;
Mor, T .
PHYSICAL REVIEW A, 1996, 54 (04) :2651-2658
[6]   Quantum repeaters:: The role of imperfect local operations in quantum communication [J].
Briegel, HJ ;
Dür, W ;
Cirac, JI ;
Zoller, P .
PHYSICAL REVIEW LETTERS, 1998, 81 (26) :5932-5935
[7]  
Bruschi D. E., 2014, REPEATER UNTIL SUCCE
[8]   Quantum information to the home [J].
Choi, Iris ;
Young, Robert J. ;
Townsend, Paul D. .
NEW JOURNAL OF PHYSICS, 2011, 13
[9]   Long-distance quantum communication with atomic ensembles and linear optics [J].
Duan, LM ;
Lukin, MD ;
Cirac, JI ;
Zoller, P .
NATURE, 2001, 414 (6862) :413-418
[10]   QUANTUM CRYPTOGRAPHY BASED ON BELL THEOREM [J].
EKERT, AK .
PHYSICAL REVIEW LETTERS, 1991, 67 (06) :661-663