Abstract
Nonlocality is one of the distinctive features of quantum mechanics and has different forms in practice, e.g., non-separability, quantum steering, and Bell nonlocality. Here, by exploiting the high-dimensional probability tensor, we propose a quantum magic square model to characterize the diverse forms of nonlocal phenomena in a single protocol. In this model, the nonlocalities are manifested in the partial-sums of the probability tensor, where the uncertainty relation serves as an “indicator” of different nonlocal phenomena. We derive a conditional majorization uncertainty relation criterion to witness the quantum steering. The new criterion is applicable to infinite number of observables and is found superior to the formerly thought optimal steering criterion.
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Acknowledgements
This work was supported in part by the Strategic Priority Research Program of the Chinese Academy of Sciences, Grant No.XDB23030100; and by the National Natural Science Foundation of China(NSFC) under the Grants 11975236 and 11635009.
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Li, JL., Qiao, CF. Characterizing quantum nonlocalities per uncertainty relation. Quantum Inf Process 20, 109 (2021). https://doi.org/10.1007/s11128-021-03043-x
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DOI: https://doi.org/10.1007/s11128-021-03043-x