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arXiv 1609.07463quant-ph
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Bell态量子擦除器的量子信息理论

Quantum information theory of the Bell-state quantum eraser

Jennifer R. Glick, Christoph Adami

摘要:

量子系统可以显示粒子或波的性质,这取决于对它们进行的测量类型。贝尔态量子擦除器是一个将二元性带到最前沿的实验,因为可以追溯地进行单个测量来测量粒子或波动性质(或介于两者之间的任何性质)。在这里,我们开发了一个统一的信息理论描述这个(和几个相关的)量子测量的情况下,揭示了测量的量子和经典特征之间的权衡。特别是,我们表明,量子态的相干性和从它获得的经典信息可以描述使用量子信息理论的工具,这两个措施满足一个等式的帐户链规则的熵。相干信息和哪条路径信息在状态准备和状态确定方面有简单的解释,并提出了解释经典世界和量子世界之间关系的方法。

英文摘要:

Quantum systems can display particle- or wave-like properties, depending on the type of measurement that is performed on them. The Bell-state quantum eraser is an experiment that brings the duality to the forefront, as a single measurement can retroactively be made to measure particle-like or wave-like properties (or anything in between). Here we develop a unitary information-theoretic description of this (and several related) quantum measurement situations that sheds light on the trade-off between the quantum and classical features of the measurement. In particular, we show that both the coherence of the quantum state and the classical information obtained from it can be described using quantum-information-theoretic tools only, and that those two measures satisfy an equality on account of the chain rule for entropies. The coherence information and the which-path information have simple interpretations in terms of state preparation and state determination, and suggest ways to account for the relationship between the classical and the quantum world.

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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