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One-step direct measurement of the entangled W states with cross-Kerr nonlinearity

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Abstract

We propose a scheme to directly measure the entangled W states with cross-Kerr nonlinearity mediums. We find that a well-designed structure can measure three-photon, four-photon and even N-photon W states in one step. Only PBSs and cross-Kerr nonlinearity mediums are used in this scheme, which is feasible for experiments. We explore the measurement of the three-photon W states and extend it to four-photon and N-photon W states.

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Acknowledgements

This work was supported by the Young and Middle-aged Teacher Education Research Project of Fujian Province under Grants No. JAT191145, the Sile Lin Project, Grants No. JAT190437, the Siyang Hao Project, the electrical engineering and its automation application discipline construction project (yx190301), and college education reform of Jinshan College of Fujian Agriculture and Forestry University (jx200310).

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Authors and Affiliations

  1. Jinshan College of Fujian Agriculture and Forestry University, Fuzhou, 350001, China

    Si-Le Lin, Pei-Yao Hong & Qiao-Hui Guo

  2. Yango University, Fuzhou, 350001, China

    Chun-Lin Zhang

  3. Fujian Police College, Fuzhou, 350001, China

    Si-Yang Hao

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  1. Si-Le Lin
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  2. Chun-Lin Zhang
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  3. Si-Yang Hao
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  4. Pei-Yao Hong
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  5. Qiao-Hui Guo
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Correspondence to Si-Le Lin.

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This work was financially supported by the funding (Funding Numbers: JAT191145, JAT190437) from the Fujian Education Department, the electrical engineering and its automation application discipline construction project (yx190301), and college education reform of Jinshan College of Fujian Agriculture and Forestry University (jx200310).

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Lin, SL., Zhang, CL., Hao, SY. et al. One-step direct measurement of the entangled W states with cross-Kerr nonlinearity. Indian J Phys 96, 1799–1803 (2022). https://doi.org/10.1007/s12648-021-02097-y

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  • DOI: https://doi.org/10.1007/s12648-021-02097-y

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