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Abstract: Recently, Briegel et al.
present a quantum repeaters protocol using nestentanglement purification for long distance quantum communicationPhysicalReview Letters \textbf{81},5932.
In this paper we present a modified schemefor constructing an optimal quantum repeater using doubly entangled photonpairs that overcomes the limitations of quantum communication via noisychannels.
Based on the imperfect quantum operations and classicalcommunications, the polarization entangled quantum channels can be built with abetter efficiency.



Autor: Chuan Wang, Rong-Zhen Jiao, Hai-Qiang Ma, Yong Zhang, Li Yu

Fuente: https://arxiv.org/



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