arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.02273quant-ph
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兼容性场景中行为的默认上下文

Contextuality-by-default for behaviours in compatibility scenarios

Alisson Tezzin, Rafael Wagner, Barbara Amaral

摘要:

我们表明,上下文默认(CbD)背后的主要思想,即,物理测量必须被理解为随机变量的上下文集合的假设隐含在上下文性(CA)的兼容性超图方法中,并使用该结果来在后者中发展前者中引入的重要概念。我们在CA中引入了非退化条件,这是相容连通性的类似条件,并证明了这个条件,在一般情况下,弱于无扰动条件。非退化行为的集合定义了一个多面体,这意味着可以使用线性不等式来描述一致连通性。我们引入了行为的扩展语境性的概念,证明了一个行为在标准意义上是非语境的当且仅当它在扩展意义上是非退化的和非语境的。最后,我们使用扩展的场景和行为来阐明我们的结果。

英文摘要:

We show that the main idea behind contextuality-by-default (CbD), i.e., the assumption that a physical measurement has to be understood as a contextual collection of random variables, is implicit in the compatibility-hypergraph approach to contextuality (CA) and use this result to develop in the latter important concepts which were introduced in the former. We introduce in CA the non-degeneracy condition, which is the analogous of consistent connectedness, and prove that this condition is, in general, weaker than non-disturbance condition. The set of non-degenerate behaviours defines a polytope, implying that one can characterize consistent connectedness using linear inequalities. We introduce the idea of extended contextuality for behaviours and prove that a behaviour is non-contextual in the standard sense iff it is non-degenerate and non-contextual in the extended sense. Finally, we use extended scenarios and behaviours to shed new light on our results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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