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arXiv 1205.3755quant-phcond-mat.mes-hall
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量子柴郡猫(Quantum Cheshire Cat)

Hunting for the Quantum Cheshire Cat

Antonio Di Lorenzo

摘要:

我们分析了Aharonov,Popescu,Rohrlich和Skrzypczyk [New.物理学杂志15,113015]从粒子中分离物理性质。我们认为,一个不同的标准,交叉平均$\langle \mathrm{`}cat\ somewhere \mbox{'}\times \mathrm{`}grin\ somewhere\ else\mbox{'}\rangle$的基础上,应被用来检测disembodiment,而不是本地平均值$\langle \mathrm{`}cat\ somewhere \mbox{'}\rangle$和$\langle\mathrm{`}grin\ somewhere\ else\mbox{'}\rangle$。在这里,精确的概率分布和它的特征函数导出任意耦合强度,准备和后选择。这允许成功地追捕量子柴郡猫,表明它是干涉的结果,它也存在于中等强度的测量中,并且它在后选择测量中相当常见。

英文摘要:

We analyze the proposal of Aharonov, Popescu, Rohrlich and Skrzypczyk [New. J. Phys. 15, 113015] of disembodying physical properties from particles. We argue that a different criterion, based on the cross-average $\langle \mathrm{`}cat\ somewhere \mbox{'}\times \mathrm{`}grin\ somewhere\ else\mbox{'}\rangle$ should be used to detect the disembodiment, rather than the local averages $\langle \mathrm{`}cat\ somewhere \mbox{'}\rangle$ and $\langle\mathrm{`}grin\ somewhere\ else\mbox{'}\rangle$. Here, the exact probability distribution and its characteristic function are derived for arbitrary coupling strength, preparation and post-selection. This allows to successfully hunt down the quantum Cheshire cat, showing that it is a consequence of interference, that it is present also for intermediate-strength measurements, and that it is a rather common occurrence in post-selected 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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