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Effective scheme for \(W\)-state fusion with weak cross-Kerr nonlinearities

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Abstract

We propose a effective \(W\)-state fusion scheme with the help of weak cross-Kerr nonlinearities, which can fuse a \(n\)-qubit \(W\) state and a \(m\)-qubit \(W\) state to a \((m+n-1)\)-qubit state without an ancillary photon. Specially, the present scheme can fuse two Bell states to create a three-qubit \(W\) state. We analyze the resource cost and the success probability of the scheme. The analysis shows that the present scheme requires less resource cost compared with the previous ones and can be achieved with high probability under the current experiment technology.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China under Grants Nos. 61465013, 11465020, and 11264042; the Program for Chun Miao Excellent Talents of Jilin Provincial Department of Education under Grant No. 201316; and the Talent Program of Yanbian University of China under Grant No. 950010001.

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Authors and Affiliations

  1. Department of Physics, College of Science, Yanbian University, Yanji, 133002, Jilin, People’s Republic of China

    Xue Han, Shi Hu, Hong-Fu Wang & Shou Zhang

  2. Department of Physics, Harbin Institute of Technology, Harbin, 150001, Heilongjiang, People’s Republic of China

    Qi Guo

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  1. Xue Han
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  2. Shi Hu
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  3. Qi Guo
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  4. Hong-Fu Wang
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  5. Shou Zhang
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Correspondence to Shou Zhang.

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Han, X., Hu, S., Guo, Q. et al. Effective scheme for \(W\)-state fusion with weak cross-Kerr nonlinearities. Quantum Inf Process 14, 1919–1932 (2015). https://doi.org/10.1007/s11128-015-0960-x

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  • DOI: https://doi.org/10.1007/s11128-015-0960-x

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