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Tripartite quantum state violating the hidden influence constraints

By Tomer Jack Barnea, Jean-Daniel Bancal, Yeong-Cherng Liang and Nicolas Gisin

Abstract

The possibility to explain quantum correlations via (possibly) unknown causal influences propagating gradually and continuously at a finite speed v > c has attracted a lot of attention recently. In particular, it could be shown that this assumption leads to correlations that can be exploited for superluminal communication. This was achieved studying the set of possible correlations that are allowed within such a model and comparing them to correlations produced by local measurements on a four-party entangled quantum state. Here, we report on a quantum state that allows for the same conclusion involving only three parties.Comment: 7 pages, essentially published version, updated acknowledgment

Topics: Quantum Physics
Publisher: 'American Physical Society (APS)'
Year: 2014
DOI identifier: 10.1103/PhysRevA.88.022123
OAI identifier: oai:arXiv.org:1304.1812

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