Storage and retrieval of continuous-variable polarization-entangled cluster states in atomic ensembles release_3cy7llhog5ewniwoa52oi7c5pi

by Da-Chuang Li, Chun-Hua Yuan, Zhuo-Liang Cao, Weiping Zhang

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We present a proposal for storing and retrieving a continuous-variable quadripartite polarization-entangled cluster state, using macroscopic atomic ensembles in a magnetic field. The Larmor precession of the atomic spins leads to a symmetry between the atomic canonical operators. In this scheme, each of the four spatially separated pulses passes twice through the respective ensemble in order to map the polarization-entangled cluster state onto the long-lived atomic ensembles. The stored state can then be retrieved by another four read-out pulses, each crossing the respective ensemble twice. By calculating the variances, we analyzed the fidelities of the storage and retrieval, and our scheme is feasible under realistic experimental conditions.
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Type  article
Stage   accepted
Date   2011-08-25
Version   v2
Language   en ?
arXiv  1105.4814v2
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