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arxiv 2405.20286 v3 pith:HGY6GCWM submitted 2024-05-30 quant-ph

Monogamy of Nonlocal Games

classification quant-ph
keywords monogamyrelationsbellgamenonlocalquantumscenariofour-player
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Bell monogamy relations characterize the trade-offs in Bell inequality violations among pairs of players in multiplayer settings. In this work, we introduce a method for extending monogamy relations from a distinguished set of configurations to monogamy relations on all possible multiplayer settings. Applying this approach, we show that nonlocality in the CHSH game arises in only two cases: the original two-player scenario and the four-player scenario on a line. While the bound for this four-player scenario follows from known quadratic monogamy constraints, we also establish two new six-party numerical monogamy relations that cannot be derived from existing results. In particular, we show there are points in the intersection of consecutive quadratic Bell monogamy relations which are not quantum realizable. Finally, we present a nonlocal game in which a single player can simultaneously saturate the quantum value with two other parties. This is the first known example of a nonlocal game unaffected by the monogamous nature of quantum entanglement.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Nonlocality of Quantum States can be Transitive

    quant-ph 2024-12 unverdicted novelty 8.0

    Nonlocality transitivity exists for quantum states, shown by explicit constructions using Bell-inequality tensoring and occurring in Haar-random three-qutrit states.