第二类拓扑迈斯纳态
Type-II Topological Meissner States
摘要：
本文研究了具有Majorana束缚态的数量守恒对跃迁的相互作用正方格子两脚费米子梯模型中合成磁场的\emph{orbital effects}。利用密度矩阵重整化群和精确对角化方法，我们识别出一种新的第二类拓扑Meissner $($ \emph{topo} -Meissner $)$相$($，它不同于低场第一类\emph{topo} -Meissner态$)$，当\emph{high}磁通量穿过梯形格时，它不仅表现出沿着腿的大的均匀循环手征电流，著名的迈斯纳状态的特点，但也容纳了拓扑保护的基态流形由于\emph{reentrant}出现的马约拉纳结束模式。我们的工作揭示了在低维量子系统中，规范场与强相互作用之间的相互作用在建立物质的内禀拓扑态时产生的一些有趣的干涉效应.
英文摘要：
We study the \emph{orbital effects} of the synthetic magnetic fields in an interacting square lattice two-leg fermionic ladder model with the number-conserving pair hopping that hosting the Majorana bound states. By utilizing density matrix renormalization group and exact diagonalization, we identify a novel type-II topological Meissner $($\emph{topo}-Meissner$)$ phase $($as distinguished from the low-field type-I \emph{topo}-Meissner state$)$ when threading a \emph{high} magnetic flux through the plaquette of the ladder, which not only exhibits a large uniformly circulating chiral current along the legs, the characteristics of the celebrated Meissner state, but also accommodates a topologically protected ground-state manifold due to the \emph{reentrant} emergence of the Majorana end modes. Our work reveals some interesting interference effects resulting from the interplay between the gauge fields and the strong interactions in establishing the intrinsic topological states of matter in low-dimensional quantum systems.
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