Manipulation of entangled states for quantum information processing

被引:0
作者
Bose, S [1 ]
Huelga, SF [1 ]
Jonathan, D [1 ]
Knight, PL [1 ]
Murao, M [1 ]
Plenio, MB [1 ]
Vedral, V [1 ]
机构
[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Opt Sect, London SW7 2BZ, England
来源
QUANTUM COMMUNICATION, COMPUTING, AND MEASUREMENT 2 | 2000年
关键词
D O I
暂无
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Entanglement manipulation, and especially Entanglement Swapping is at the heart of current work on quantum information processing, purification and quantum teleportation. We will discuss how it may be generalized to multiparticle systems and how this enables multi-user quantum cryptographic protocols to be developed. Our scheme allows us to establish multiparticle entanglement between particles which belong to distant users in a communication network through a prior distribution of Bell state singlets followed by local measurements. We compare our method for generating entanglement with existing schemes using simple quantum networks, and highlight the advantages and applications in cryptographic conferencing and in reading messages from more than one source through a single quantum measurement. We also discuss how entanglement leads to the idea of 'telecloning', in which a teleportation-like protocol can be found which reproduces the output of an optimal quantum cloning machine.
引用
收藏
页码:49 / 58
页数:10
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