Entanglement concentration for W-type entangled coherent states

An entangled coherent state （ECS） is one type of entanglement, which is widely discussed in the application of quan- tum information processing （QIP）. In this paper, we propose an entanglement concentration protocol （ECP） to distill the maximally entangled W-type ECS from the partially entangled W-t...

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Bibliographic Details
Published in:Chinese physics B 2014-08, Vol.23 (8), p.269-273
Main Authors: Sheng, Yu-Bo, Liu, Jiong, Zhao, Sheng-Yang, Wang, Lei, Zhou, Lan
Format: Article
Language:English
Subjects:
Amplitudes
Balancing
Beam splitters
Coherence
Data processing
ECP
Entanglement
Parity
Photons
奇偶校验
对相干态
浓度
纠缠相干态
量子信息处理
量子通信
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Summary:An entangled coherent state （ECS） is one type of entanglement, which is widely discussed in the application of quan- tum information processing （QIP）. In this paper, we propose an entanglement concentration protocol （ECP） to distill the maximally entangled W-type ECS from the partially entangled W-type ECS. In the ECP, we adopt the balanced beam split- ter （BS） to make the parity check measurement. Our ECP is quite different from the conventional ECPs. After performing the ECP, not only can we obtain the maximally entangled ECS with some success probability, but also we can increase the amplitude of the coherent state. Therefore, it is especially useful in long-distance quantum communication, if the photon loss is considered.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/8/080305