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International Journal of Theoretical Physics

Practical Entanglement Concentration for Entangled Coherent States

Yu‐Bo Sheng, Chang-Cheng Qu, Yang Ou-Yang, Zhao-Feng Feng, Lan Zhou

Published Jan 24, 2014• 7 citations
Publisher
DOI
10.1007/s10773-014-2009-9

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The cluster state is of fundamental importance in one-way quantum computation, but it is fragile in practical noisy environments. In this paper, we describe a method for distilling the maximally entangled atomic cluster state from the arbitrary less-entangled atomic cluster state. During the entire protocol, we only require one pair of less-entangled atomic cluster state and some auxiliary single atoms. Interestingly, the less-entangled atomic cluster state and the auxiliary single atoms do not interact with each other directly. By setting the robust coherent state as the input–output of the low-Q cavities, the concentration task can be achieved. Moreover, the total success probability can be increased by repeating the whole process. This entanglement concentration protocol may have practical applications in one-way quantum computation.