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long distance measurement device independent quantum key distribution with quantum memories

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Long distance measurement device independent quantum key distribution with quantum memories

×÷Õß:Sun, Y (Sun Ying)[ 1 ] ; Zhao, SH (Zhao Shang-Hong)[ 1 ] ; Dong, C (Dong Chen)[ 1,2 ]

ACTA PHYSICA SINICA

¾í: 64

ÆÚ: 14

ÎÄÏ׺Å: 140304

DOI: 10.7498/aps.64.140304

³ö°æÄê: JUL 20 2015

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We propose a long distance measurement-device-independent (MDI) quantum-key-distribution (QKD) with quantum memory, and analyze the relationship between the key generation rate and the storage efficiency of quantum memory. Our protocol is considered and compared with MDI-QKD without quantum memory. We present general formulas for our protocol with three-intensity decoy states. The simulation results show that the maximum secure distance supported by MDI-QKD with quantum memory is about 500 km, while the maximum secure distance of MDI-QKD without quantum memory is only 216 km. With certain limits, prolonging the time of maintaining the necessary quantum fidelity can increase security key transmission distance. Furthermore, the protocol is robust against device imperfection such as quantum memory decoherence effects, which can be easily applied to practical QKD system.
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×÷Õ߹ؼü´Ê:quantum memory; measurement device independent quantum key distribution; decoy state

KeyWords Plus:SECURITY; REPEATERS
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ͨѶ×÷ÕßµØÖ·: Sun, Y (ͨѶ×÷Õß)
[ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ]         Air Force Engn Univ, Sch Informat & Nav, Xian 710077, Peoples R China.

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[ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ]         [ 1 ] Air Force Engn Univ, Sch Informat & Nav, Xian 710077, Peoples R China
              [ 2 ] Xian Commun Coll, Dept Informat Secur, Xian 710006, Peoples R China

µç×ÓÓʼþµØÖ·:sunyingkgd@163.com
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»ù½ð×ÊÖú»ú¹¹        ÊÚȨºÅ
National Natural Science Foundation of China        
61106068
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CHINESE PHYSICAL SOC, P O BOX 603, BEIJING 100080, PEOPLES R CHINA
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Ñо¿·½Ïòhysics

Web of Science Àà±ðhysics, Multidisciplinary
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ÎÄÏ×ÀàÐÍ:Article

ÓïÖÖ:Chinese

Èë²ØºÅ: WOS:000362976400008

ISSN: 1000-3290
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    Impact Factor (Ó°ÏìÒò×Ó): Journal Citation Reports®

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IDS ºÅ: CT7EK

Web of Science ºËÐĺϼ¯ÖÐµÄ "ÒýÓõIJο¼ÎÄÏ×": 26

Web of Science ºËÐĺϼ¯ÖÐµÄ "±»ÒýƵ´Î": 2
2Â¥2016-10-08 16:25:44
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3Â¥: Originally posted by lazy½õϪ at 2016-10-08 16:26:17
Èë²ØºÅ: WOS:000362976400008

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