Bipartite Postquantum Steering in Generalized Scenarios

Sainz, Ana Belén; Hoban, Matty J.; Skrzypczyk, Paul and Aolita, Leandro. 2020. Bipartite Postquantum Steering in Generalized Scenarios. Physical Review Letters, 125(050404), ISSN 0031-9007 [Article]

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Abstract or Description

The study of stronger-than-quantum effects is a fruitful line of research that provides valuable insight into quantum theory. Unfortunately, traditional bipartite steering scenarios can always be explained by quantum theory. Here, we show that, by relaxing this traditional setup, bipartite steering incompatible with quantum theory is possible. The two scenarios we describe, which still feature Alice remotely steering Bob’s system, are (i) one where Bob also has an input and operates on his subsystem, and (ii) the “instrumental steering” scenario. We show that such bipartite postquantum steering is a genuinely new type of postquantum nonlocality, which does not follow from postquantum Bell nonlocality. In addition, we present a method to bound quantum violations of steering inequalities in these scenarios.

Item Type:

Article

Identification Number (DOI):

https://doi.org/10.1103/PhysRevLett.125.050404

Departments, Centres and Research Units:

Computing

Dates:

DateEvent
29 June 2020Accepted
29 July 2020Published

Item ID:

29228

Date Deposited:

14 Sep 2020 09:16

Last Modified:

15 Sep 2020 17:15

Peer Reviewed:

Yes, this version has been peer-reviewed.

URI:

http://research.gold.ac.uk/id/eprint/29228

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