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Entanglement purification for a three-qubit W-like state in amplitude damping

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Abstract

We propose a recurrence entanglement purification protocol to purify the three-qubit W-like state affected by amplitude damping, and we give an analytic expression for the protocol’s purification range. By using the protocol, we illustrate the purification for an asymmetric W state and its generalized state. Nonlocal and maximal bipartite entanglements with corresponding probabilities can be obtained as byproducts in the course of the purification. What is important is that we also show the necessity for the single-qubit operations in the purification protocol.

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Authors and Affiliations

  1. Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China

    Li-Li Sun & Shou Zhang

  2. Department of Physics, College of Science, Yanbian University, Yanji, Jilin, 133002, China

    Hong-Fu Wang & Shou Zhang

  3. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, 116024, China

    Hong-Fu Wang

  4. BK21 Program Physics & Department of Physics, College of Natural Science, Chungbuk National University, Cheonju, 361-763, Korea

    Kyu-Hwang Yeon

Authors
  1. Li-Li Sun
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  2. Hong-Fu Wang
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  3. Shou Zhang
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  4. Kyu-Hwang Yeon
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Correspondence to Shou Zhang.

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Sun, LL., Wang, HF., Zhang, S. et al. Entanglement purification for a three-qubit W-like state in amplitude damping. Journal of the Korean Physical Society 61, 1938–1943 (2012). https://doi.org/10.3938/jkps.61.1938

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  • DOI: https://doi.org/10.3938/jkps.61.1938

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