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arXiv 2106.09045quant-ph
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无不相容性的语境性

Contextuality without incompatibility

John H. Selby, David Schmid, Elie Wolfe, Ana Belén Sainz, Ravi Kunjwal, Robert W. Spekkens

AI总结:

本文证明测量不相容性对于广义非语境性失败的证明既非必要也非充分,并指出任何量子准备-测量场景中的广义非语境性失败证明都可转化为无不相容测量的对应场景中的证明。

摘要:

不相容测量的存在通常被认为是量子理论的一个特征,表明它与任何经典世界观不一致。为了在Kochen-Specker非语境性意义上证明经典性的失败,确实需要不相容测量集合。然而,一个更广泛适用的经典性概念是广义非语境本体论模型的存在。特别是,这一概念即使在单个非投影测量中也能对结果的表示施加约束。我们利用这一事实证明,测量不相容性对于证明广义非语境性的失败既不是必要的,也不是充分的。此外,我们证明,在量子准备-测量场景中,每一个证明广义非语境性失败的证明都可以转化为一个相应的没有不相容测量的场景中证明广义非语境性失败的证明。

英文摘要:

The existence of incompatible measurements is often believed to be a feature of quantum theory which signals its inconsistency with any classical worldview. To prove the failure of classicality in the sense of Kochen-Specker noncontextuality, one does indeed require sets of incompatible measurements. However, a more broadly applicable notion of classicality is the existence of a generalized-noncontextual ontological model. In particular, this notion can imply constraints on the representation of outcomes even within a single nonprojective measurement. We leverage this fact to demonstrate that measurement incompatibility is neither necessary nor sufficient for proofs of the failure of generalized noncontextuality. Furthermore, we show that every proof of the failure of generalized noncontextuality in a quantum prepare-measure scenario can be converted into a proof of the failure of generalized noncontextuality in a corresponding scenario with no incompatible measurements.

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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