Could tripartite Leggett-type nonlocality be tested?

doi:10.7523/j.ucas.2021.0087

Abstract

Abstract: The Leggett inequality is a constraint on the bipartite correlation that admits certain types of nonlocalities. Could such constraints be obtained for more parties? Here in search for the answer we found new inequalities for three parties which could be used to check the compatibility between quantum mechanics and nonlocal realism. For certain measurement settings violations are found for GHZ, W and an arbitrary three-qubit pure states. Our inequalities are stronger than the existing inequality in literature (arXiv:1111. 4119v1). These experimentally realizable inequalities, generalization to n-parties possible, could better our explanations for nonlocal correlations in multiparty case, along with some applications in cryptographic key distribution beyond the standard quantum key distribution schemes.

Key words: multipartite nonlocality, tripartite Leggett model, nonlocal realism

CLC Number:

O413.1

KHAN Abdul, YANG Macheng, QIAO Congfeng. Could tripartite Leggett-type nonlocality be tested?[J]. Journal of University of Chinese Academy of Sciences, 2023, 40(3): 297-302.

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