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arXiv 2104.12495quant-ph
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语境与随机变量

Contextuality and Random Variables

Ehtibar Dzhafarov

摘要:

背景性是随机变量系统的一个性质。系统中随机变量的同一性由它与所有其他随机变量在同一背景下的联合分布确定。当上下文发生变化时,测量某个属性的变量会立即被另一个测量相同属性的随机变量所取代,或者如果这个属性在新的上下文中没有被测量,则会立即消失。这种替换/消失不需要行动、信号或干扰,尽管它并不排除它们。两个随机变量在不同情境下测量相同属性的差异由它们的最大耦合来测量,如果系统的总耦合之一以这些最大耦合作为其边缘,则系统是非情境的。

英文摘要:

Abstract Contextuality is a property of systems of random variables. The identity of a random variable in a system is determined by its joint distribution with all other random variables in the same context. When context changes, a variable measuring some property is instantly replaced by another random variable measuring the same property, or instantly disappears if this property is not measured in the new context. This replacement/disappearance requires no action, signaling, or disturbance, although it does not exclude them. The difference between two random variables measuring the same property in different contexts is measured by their maximal coupling, and the system is noncontextual if one of its overall couplings has these maximal couplings as its marginals.

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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