Bell-type inequalities for arbitrary noncyclic networks
Number of Authors: 1
2016 (English)In: Physical Review A, ISSN 2469-9926, Vol. 93, no 3, 030101Article in journal (Refereed) Published
Bell inequalities bound the strength of classical correlations between observers measuring on a shared physical system. However, studies of physical correlations can be considered beyond the standard Bell scenario by networks of observers sharing some configuration of many independent physical systems. Here, we show how to construct Bell-type inequalities for correlations arising in any tree-structured network, i.e., networks without cycles. This is achieved by an iteration procedure that in each step allows one to add a branch to the tree-structured network and construct a corresponding Bell-type inequality. We explore our inequalities in several examples, in all of which we demonstrate strong violations from quantum theory.
Place, publisher, year, edition, pages
2016. Vol. 93, no 3, 030101
IdentifiersURN: urn:nbn:se:su:diva-128506DOI: 10.1103/PhysRevA.93.030101ISI: 000371391500001OAI: oai:DiVA.org:su-128506DiVA: diva2:918402