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DECOHERENCE-FREE QUANTUM MEMORY FOR PHOTONIC STATE USING ATOMIC ENSEMBLES

Laboratory of Photonic Information Technology, School for Information and Photoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, P. R. China

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YA-FEI YU

Laboratory of Photonic Information Technology, School for Information and Photoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, P. R. China

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, and

ZHI-MING ZHANG

Laboratory of Photonic Information Technology, School for Information and Photoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, P. R. China

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https://doi.org/10.1142/S021974990900547XCited by:2 (Source: Crossref)

Abstract

Large scale quantum information processing requires stable and long-lived quantum memories. Here, using atom-photon entanglement, we propose an experimentally feasible scheme to realize decoherence-free quantum memory with atomic ensembles, and show one of its applications, remote transfer of unknown quantum state, based on laser manipulation of atomic ensembles, photonic state operation through optical elements, and single-photon detection with moderate efficiency. The scheme, with inherent fault-tolerance to the practical noise and imperfections, allows one to retrieve the information in the memory for further quantum information processing within the reach of current technology.

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