arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2108.07590math.CO
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Q图上的量子态转移

Quantum state transfer on Q-graphs

Xiao-Qin Zhang, Shu-Yu Cui, Gui-Xian Tian

摘要:

本文研究了$\mathcal{Q}$ -图中量子态转移的存在性。图$G$的$\mathcal{Q}$ -图,记为$\mathcal{Q}(G)$,是通过向$G$的每条边插入一个新的顶点并通过一条边连接位于$G$的邻边上的两个新的顶点而从$G$导出的图。证明了如果正则图$G$的所有特征值都是整数,则它的$\mathcal{Q}$ -图$\mathcal{Q}(G)$不存在完美状态转移.与此相反,我们还证明了正则图的$\mathcal{Q}$ -图在一定的条件下具有很好的状态转移。最后,应用所得到的结果,我们还展示了许多新的家庭的$\mathcal{Q}$ -图没有完美的状态转移,但承认相当不错的状态转移。

英文摘要:

We study the existence of quantum state transfer in $\mathcal{Q}$-graphs in this paper. The $\mathcal{Q}$-graph of a graph $G$, denoted by $\mathcal{Q}(G)$, is the graph derived from $G$ by plugging a new vertex to each edge of $G$ and joining two new vertices which lie on adjacent edges of $G$ by an edge. We show that, if all eigenvalues of a regular graph $G$ are integers, then its $\mathcal{Q}$-graph $\mathcal{Q}(G)$ has no perfect state transfer. In contrast, we also prove that the $\mathcal{Q}$-graph of a regular graph has pretty good state transfer under some mild conditions. Finally, applying the obtained results, we also exhibit many new families of $\mathcal{Q}$-graphs having no perfect state transfer, but admitting pretty good state transfer.

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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