Nonclassically causal correlations without backwards-in-time signaling

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Abstract

We investigate the relationship between no backwards in time signalling and classically causal correlations. We discover that unlike the case for two parties, the no backwards in time signaling paradigm for three parties is not enough to ensure that correlations can be reproduced with a classical causal ordering. We demonstrate this with an explicit example. We also generalise some existing results for linear two-time states to multi-party scenarios.
Original languageEnglish
Article number022101
Number of pages9
JournalPhysical Review A
Volume99
Issue number2
Early online date4 Feb 2019
DOIs
Publication statusPublished - Feb 2019

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