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Nonclassically causal correlations without backwards-in-time signaling

Research output: Contribution to journalArticle

Original languageEnglish
Article number022101
Number of pages9
JournalPhysical Review A
Issue number2
Early online date4 Feb 2019
DateAccepted/In press - 17 Jan 2019
DateE-pub ahead of print - 4 Feb 2019
DatePublished (current) - Feb 2019


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.

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