Limit density of 2D quantum walk: zeroes of the weight function

Limit density of 2D quantum walk: zeroes of the weight function
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二维量子行走的极限密度:权函数的零点

DOI:
10.4036/iis.2017.a.03
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发表时间:
2017
期刊:
arXiv: Quantum Physics
影响因子:
--
通讯作者:
I. Jex
I. Jex
中科院分区:
--
文献类型:
--
作者:
M. Štefaňák;I. Bezdeková;I. Jex

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由离散时间量子行走产生的概率分布的性质,例如它包含的峰的数量,强烈地依赖于初始条件的选择。本文从这一观点出发,讨论了K。Watabe等人,A 77,062331,(2008)。我们表明,极限密度可以改变这样一种方式,它消失的边界或一些线。使用这个结果,可以抑制概率分布中的某些峰值。通过选择更合适的硬币空间基,即由硬币算子的本征向量形成的基,大大简化了分析。
Properties of the probability distribution generated by a discrete-time quantum walk, such as the number of peaks it contains, depend strongly on the choice of the initial condition. In the present paper we discuss from this point of view the model of the two-dimensional quantum walk analyzed in K. Watabe et al., Phys. Rev. A 77, 062331, (2008). We show that the limit density can be altered in such a way that it vanishes on the boundary or some line. Using this result one can suppress certain peaks in the probability distribution. The analysis is simplified considerably by choosing a more suitable basis of the coin space, namely the one formed by the eigenvectors of the coin operator.
DOI: --
发表时间: 2008
期刊: Phys. Rev. A 77
影响因子: --
作者:
K. Watabe;N. Kobayashi;M. Katori;N. Konno
通讯作者: N. Konno
旋转矩阵和量子行走的维格纳公式
DOI: --
发表时间: 2007
期刊: Phys. Rev. A 76
影响因子: --
作者:
T. Miyazaki;M. Katori;N. Konno
通讯作者: N. Konno