Bipartite Postquantum Steering in Generalized Scenarios

Ana Belen Sainz, Matty J. Hoban, Paul Skrzypczyk, Leandro Aolita

Research output: Contribution to journalArticle (Academic Journal)

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Abstract

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.
Original languageEnglish
Article number050404
Number of pages6
JournalPhysical Review Letters
Volume125
DOIs
Publication statusPublished - 29 Jul 2020

Structured keywords

  • Bristol Quantum Information Institute
  • QITG

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