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Enlarge the scale of W state by connecting multiple existed W states

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Abstract

We propose a simple scheme to generate large-scale W state. With the cross-phase modulation, we design a photon number resolving discrimination. This discrimination, associated with some single-photon operations, is enough to connect the existed W states. No more two-photon or multi-photon operations are required. This scheme is powerful and flexible for connecting arbitrary number of W states. It is therefore suitable for creating large-scale W state with the current technology.

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Acknowledgments

This work was funded by National Natural Science Foundation of China (Grant No. 11574093), Natural Science Foundation of Fujian Province of China (Grant No. 2014J01015), Program for New Century Excellent Talents in Fujian Province University (Grant No. 2012FJ-NCET-ZR04) and Promotion Program for Young and Middle-aged Teacher in Science and Technology Research of Huaqiao University (Grant No. ZQN-PY113).

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Authors and Affiliations

  1. Fujian Provincial Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen, 361021, China

    Yun Zhai & Qing Lin

  2. College of Computer Science and Technology, Huaqiao University, Xiamen, 361021, China

    Ye-Wang Chen

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  1. Yun Zhai
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  2. Ye-Wang Chen
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  3. Qing Lin
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Correspondence to Qing Lin.

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Zhai, Y., Chen, YW. & Lin, Q. Enlarge the scale of W state by connecting multiple existed W states. Quantum Inf Process 15, 761–772 (2016). https://doi.org/10.1007/s11128-015-1200-0

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