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arXiv 2102.00410quant-ph
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使用单个测量设备揭示量子上下文

Revealing quantum contextuality using a single measurement device

Jaskaran Singh, Rajendra Singh Bhati, Arvind

摘要:

在这项工作中,我们分析了测量非上下文(MNC)的概念,并确定上下文的情况下,只涉及一个单一的测量设备的顺序测量。我们发现,任何非上下文的本体论模型无法解释一个精心构造的正算子值测度(POVM)顺序执行量子系统的统计结果。测量的背景来自于可以使用设备的不同配置。我们开发了一个不等式的非上下文(NC)本体模型,并构建了一个量子的情况下,涉及测量的KCBS不等式。我们表明,由此产生的统计从这个设备违反我们的NC不等式。该设备可以通过将任意$n$ -循环上下文不等式的测量值,其中$n = 5$对应于KCBS不等式来推广。我们表明,NC和量子边界的各种情况下,可以更容易地推导出仅使用较大的值$n$的结果之间的函数关系。这使得它成为一个更简单的上下文不等式分析。

英文摘要:

In this work we analyse the notion of measurement non-contextuality (MNC) and identify contextual scenarios which involve sequential measurements of only a single measurement device. We show that any non-contextual ontological model fails to explain the statistics of outcomes of a single carefully constructed positive operator valued measure (POVM) executed sequentially on a quantum system. The context of measurement arises from the different configurations in which the device can be used. We develop an inequality from the non-contextual (NC) ontic model, and construct a quantum situation involving measurements from the KCBS inequality. We show that the resultant statistics arising from this device violate our NC inequality. This device can be generalised by incorporating measurements from arbitrary $n$-cycle contextuality inequalities of which $n = 5$ corresponds to the KCBS inequality. We show that the NC and quantum bounds for various scenarios can be derived more easily using only the functional relationships between the outcomes for larger values $n$. This makes it one of the simpler contextual inequalities to analyse.

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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