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	Quantum privacy amplification for a sequence of single qubits
	Deng Fu-Guo ; Long Gui-Lu
	2010-05-06 ; 2010-05-06
关键词	quantum privacy amplification quantum secure direct communication SECURE DIRECT COMMUNICATION NOISY CHANNELS EPR PAIRS ENTANGLEMENT TELEPORTATION SECRET CRYPTOGRAPHY OPERATIONS SCHEME STATES Physics, Multidisciplinary
中文摘要	We present a scheme for quantum privacy amplification (QPA) for a sequence of single qubits. The QPA procedure uses a unitary operation with two controlled-not gates and a Hadamard gate. Every two qubits are performed with the unitary gate operation, and a measurement is made on one photon and the other one is retained. The retained qubit carries the state information of the discarded one. In this way, the information leakage is reduced. The procedure can be performed repeatedly so that the information leakage is reduced to any arbitrarily low level. With this QPA scheme, the quantum secure direct communication with single qubits can be implemented with arbitrarily high security. We also exploit this scheme to do privacy amplification on the single qubits in quantum information sharing for long-distance communication with quantum repeaters.
语种	英语 ; 英语
出版者	INTERNATIONAL ACADEMIC PUBLISHERS LIMITED ; HONG KONG ; UNIT 1205, 12 FLOOR, SINO PLAZA, 255 GLOUCESTER ROAD, HONG KONG 00000, CAUSEWAY BAY, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/15603]
专题	清华大学
推荐引用方式 GB/T 7714	Deng Fu-Guo,Long Gui-Lu. Quantum privacy amplification for a sequence of single qubits[J],2010, 2010.
APA	Deng Fu-Guo,&Long Gui-Lu.(2010).Quantum privacy amplification for a sequence of single qubits..
MLA	Deng Fu-Guo,et al."Quantum privacy amplification for a sequence of single qubits".(2010).

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