Two-qubit causal structures and the geometry of positive qubit-maps

We study quantum causal inference in a setup proposed by Ried et al (2015 Nat. Phys. 11 414) in which a common cause scenario can be mixed with a cause–effect scenario, and for which it was found that quantum mechanics can bring an advantage in distinguishing the two scenarios: whereas in classical...

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Bibliographic Details
Published in:	New Journal of Physics
Main Authors:	Jonas M Kübler, Daniel Braun
Format:	Article
Language:	English
Published:	IOP Publishing 2018-01-01
Subjects:	quantum causal inference quantum information positive qubit-maps signed singular values
Online Access:	https://doi.org/10.1088/1367-2630/aad612

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