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arXiv 1012.4566quant-phmath-phmath.MP
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一维含时量子行走中的渐近纠缠

Asymptotic entanglement in 1D quantum walks with a time-dependent coined

S. Salimi, R. Yosefjani

摘要:

离散时间量子行走是通过一个幺正算子演化的,其中包含两个算子:一个位置空间中的条件位移算子和一个硬币算子。该操作员纠缠硬币和步行者的位置自由度。本文研究了一维格子中由两个正交矩阵确定的非均匀量子行走中硬币位置纠缠的渐近行为。硬币算符的自由参数共同提供了许多条件,在这些条件下,对硬币态进行测量可以得到所得到的位置量子态上的纠缠值。我们对硬币算符的两个自由参数所能取的所有值解析地研究了这个问题,并寻求了纠缠达到最大的条件。

英文摘要:

Discrete-time quantum walk evolve by a unitary operator which involves two operators a conditional shift in position space and a coin operator. This operator entangles the coin and position degrees of freedom of the walker. In this paper, we investigate the asymptotic behavior of the coin position entanglement (CPE) for an inhomogeneous quantum walk which determined by two orthogonal matrices in one-dimensional lattice. Free parameters of coin operator together provide many conditions under which a measurement perform on the coin state yield the value of entanglement on the resulting position quantum state. We study the problem analytically for all values that two free parameters of coin operator can take and the conditions under which entanglement becomes maximal are sought.

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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