Impossibility of bipartite full nonlocality, all-versus-nothing proofs, and pseudo-telepathy in small Bell scenarios

• URL: http://arxiv.org/abs/2310.10600v1
• Date: Mon, 16 Oct 2023 17:28:29 GMT
• Title: Impossibility of bipartite full nonlocality, all-versus-nothing proofs, and pseudo-telepathy in small Bell scenarios
• Authors: Yuan Liu, Ho Yiu Chung, Emmanuel Zambrini Cruzeiro, Junior R. Gonzales-Ureta, Ravishankar Ramanathan, Ad\'an Cabello
• Abstract summary: We show that according to quantum mechanics, nature does not allow for FN/AVN/PT in the (3,3;3,2) Bell scenario. We also study (3,3;3,3) and found no example of FN/AVN/PT.
• Score: 3.1981483719988235
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We show that the following statements are equivalent: (i) A quantum correlation p is in a face of the nonsignaling polytope that does not contain local points. (ii) p has local fraction zero; i.e., p has full nonlocality (FN). (iii) p provides an all-versus-nothing (AVN) or Greenberger-Horne-Zeilinger-like proof of nonlocality. (iv) p is a pseudo telepathy (PT) strategy. These connections imply that a long-standing question posed by Gisin, M\'ethot, and Scarani of whether quantum PT is possible with minimal requirements is fundamental for quantum information, quantum computation, and foundations of quantum mechanics, and can be addressed by a variety of strategies. Here, by combining different methods, we show that the answer is negative: according to quantum mechanics, nature does not allow for FN/AVN/PT in the (3,3;3,2) Bell scenario. Moreover, we show that FN/AVN/PT is also impossible in (3,2;3,4). We also study (3,3;3,3) and found no example of FN/AVN/PT. We discuss the implications of these results and further applications of the methods presented.

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