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Protecting qutrit-qutrit entanglement by weak measurement and reversal

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Abstract

Entangled states in high dimensional systems are of great interest due to the extended possibilities they provide in quantum information processing. Recently, Sun et al. [Phys. Rev. A 82, 052323 (2010)] and Kim et al. [Nat. Phys. 8, 117 (2012)] pointed out that weak measurement and quantum weak measurement reversal can actively combat decoherence. We generalize their studies from qubits to qutrits under amplitude damping decoherence. We find that the qutrit-qutrit entanglement can be partially retrieved for certain initial states when only weak measurement reversals are performed. However, we can completely defeat amplitude damping decoherence for any initial states by the combination of prior weak measurements and post optimal weak measurement reversals. The experimental feasibility of our schemes is also discussed.

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Authors and Affiliations

  1. College of Physics and Electronic Information, Gannan Normal University, Ganzhou, 341000, P.R. China

    Xing Xiao

  2. Institute of Optoelectronic Materials and Technology, Gannan Normal University, Ganzhou, 341000, P.R. China

    Xing Xiao

  3. School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, P.R. China

    Yan-Ling Li

Authors
  1. Xing Xiao
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  2. Yan-Ling Li
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Correspondence to Xing Xiao.

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Xiao, X., Li, YL. Protecting qutrit-qutrit entanglement by weak measurement and reversal. Eur. Phys. J. D 67, 204 (2013). https://doi.org/10.1140/epjd/e2013-40036-3

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  • DOI: https://doi.org/10.1140/epjd/e2013-40036-3

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