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Remote information concentration via \(W\) state: reverse of ancilla-free phase-covariant telecloning

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Abstract

In this paper, we investigate generalized remote information concentration as the reverse process of ancilla-free phase-covariant telecloning (AFPCT) which is different from the reverse process of optimal universal telecloning. It is shown that the quantum information via \(1\rightarrow 2\) AEPCT procedure can be remotely concentrated back to a single qubit with a certain probability by utilizing (non-)maximally entangled \(W\) states as quantum channels. Our protocols are the generalization of Wang’s scheme (Open J Microphys 3:18–21. doi:10.4236/ojm.2013.31004, 2013). And von Neumann measure and positive operator-valued measurement are performed in the maximal and non-maximal cases respectively. Relatively the former, the dimension of measurement space in the latter is greatly reduced. It makes the physical realization easier and suitable.

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Authors and Affiliations

  1. School of Mathematics and Information Science, Neijiang Normal University, Neijiang, 641100, China

    Jia-Yin Peng

  2. College of Mathematics and Software Science, Sichuan Normal University, Chengdu, 610066, China

    Jia-Yin Peng, Ming-qiang Bai & Zhi-Wen Mo

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  1. Jia-Yin Peng
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  2. Ming-qiang Bai
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  3. Zhi-Wen Mo
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Correspondence to Jia-Yin Peng.

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Peng, JY., Bai, Mq. & Mo, ZW. Remote information concentration via \(W\) state: reverse of ancilla-free phase-covariant telecloning. Quantum Inf Process 12, 3511–3525 (2013). https://doi.org/10.1007/s11128-013-0613-x

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  • DOI: https://doi.org/10.1007/s11128-013-0613-x

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