Popescu-Rohrlich box implementation in general probabilistic theory of processes

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Authors

PLÁVALA Martin ZIMAN Mário

Year of publication 2020
Type Article in Periodical
Magazine / Source Physics Letters A
MU Faculty or unit

Faculty of Informatics

Citation
Web https://doi.org/10.1016/j.physleta.2020.126323
Doi http://dx.doi.org/10.1016/j.physleta.2020.126323
Keywords quantum information; quantum nonlocality
Description It is shown that Popescu-Rohrlich nonlocal boxes (beating the Tsirelson bound for Bell inequality) do exist in the existing structures of both quantum and classical theory. In particular, we design an explicit example of measure-and-prepare nonlocal (but no-signaling) channel being the realization of nonlocal and no-signaling Popescu-Rohrlich box within the generalized probabilistic theory of processes. Further we present a post-selection-based spatially non-local implementation and show it does not require truly quantum resources, hence, improving the previously known results. Interpretation and potential (spatially non-local) simulation of this form of process nonlocality and the protocol is discussed.
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