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	Long-distance quantum teleportation assisted with free-space entanglement distribution
	Ren Ji-Gang ; Yang Bin ; Yi Zhen-Huan ; Zhou Fei ; Chen Kai ; Peng Cheng-Zhi ; Pan Jian-Wei
	2010-10-12 ; 2010-10-12
关键词	entanglement teleportation free space PODOLSKY-ROSEN CHANNELS COMMUNICATION COMPUTATION OPERATIONS STATE Physics, Multidisciplinary
中文摘要	Faithful long-distance quantum teleportation necessitates prior entanglement distribution between two communicated locations. The particle carrying on the unknown quantum information is then combined with one particle of the entangled states for Bell-state measurements, which leads to a transfer of the original quantum information onto the other particle of the entangled states. However in most of the implemented teleportation experiments nowadays, the Bell-state measurements are performed even before successful distribution of entanglement. This leads to an instant collapse of the quantum state for the transmitted particle, which is actually a single-particle transmission thereafter. Thus the true distance for quantum teleportation is, in fact, only in a level of meters. In the present experiment we design a novel scheme which has overcome this limit by utilizing fiber as quantum memory. A complete quantum teleportation is achieved upon successful entanglement distribution over 967 meters in public free space. Active feed-forward control techniques are developed for real-time transfer of quantum information. The overall experimental fidelities for teleported states are better than 89.6%, which signify high-quality teleportation.
语种	英语 ; 英语
出版者	IOP PUBLISHING LTD ; BRISTOL ; DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/81536]
专题	清华大学
推荐引用方式 GB/T 7714	Ren Ji-Gang,Yang Bin,Yi Zhen-Huan,et al. Long-distance quantum teleportation assisted with free-space entanglement distribution[J],2010, 2010.
APA	Ren Ji-Gang.,Yang Bin.,Yi Zhen-Huan.,Zhou Fei.,Chen Kai.,...&Pan Jian-Wei.(2010).Long-distance quantum teleportation assisted with free-space entanglement distribution..
MLA	Ren Ji-Gang,et al."Long-distance quantum teleportation assisted with free-space entanglement distribution".(2010).

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