arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1609.07572quant-ph
收藏

拓扑、完整性和量子行走

Topology, Holonomy, and Quantum Walks

G. Puentes

摘要:

本文综述了离散时间量子行走体系的完整性和拓扑结构的理解和表征的进展。离散时间量子行走体系由参数空间\cite{Puentesarxiv}中的两个非对易旋转序列给出的幺正步组成。与文献中最近详细研究的其他类似系统不同,该系统不存在连续的一维拓扑边界,它只存在离散的Dirac点,其中准能隙关闭。在这些离散点处,未定义拓扑绕组数。因此,这些离散点代表零维的拓扑边界,它们赋予系统非平凡的拓扑。我们通过计算Zak相位来说明系统的非平凡特性。我们还提出了一个合适的实验方案来实现这些想法,我们提出了初步的实验数据。

英文摘要:

We present a review on the progress in the understanding and characterization of holonomy and topology of a discrete-time quantum walk architecture, consisting of a unitary step given by a sequence of two non-commuting rotations in parameter space \cite{Puentesarxiv}. Unlike other similar systems recently studied in detail in the literature, this system does not present continous 1D topological boundaries, it only presents a discrete number of Dirac points where the quasi- energy gap closes. At these discrete points the topological winding number is not defined. Therefore, such discrete points represent topological boundaries of dimension zero, and they endow the system with a non-trivial topology. We illustrate the non-trivial character of the system by calculating the Zak phase. We also propose a suitable experimental scheme to implement these ideas, and we present preliminary experimental data.

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。

↑