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Nonlocal unambiguous discrimination among N nonorthogonal qudit states lying in a higher-dimensional Hilbert space

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Abstract

We give a strategy for nonlocal unambiguous discrimination (UD) among N linearly independent nonorthogonal qudit states lying in a higher-dimensional Hilbert space. The procedure we use is a nonlocal positive operator valued measurement (POVM) in a direct sum space. This scheme is designed for obtaining the conclusive nonlocal measurement results with a finite probability of success. We construct a quantum network for realizing the nonlocal UD with a set of two-level remote rotations, and thus provide a feasible physical means to realize the nonlocal UD.

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Authors and Affiliations

  1. Department of Photoelectron and Physics, Foshan University, Foshan, 528000, China

    LiBing Chen & Hong Lu

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  1. LiBing Chen
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  2. Hong Lu
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Correspondence to LiBing Chen.

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Chen, L., Lu, H. Nonlocal unambiguous discrimination among N nonorthogonal qudit states lying in a higher-dimensional Hilbert space. Sci. China Phys. Mech. Astron. 55, 55–59 (2012). https://doi.org/10.1007/s11433-011-4577-5

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  • DOI: https://doi.org/10.1007/s11433-011-4577-5

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