论文标题
在扩展的哈伯德模型中引起的互动和配对的拓扑阶段
Topological phases arising from attractive interaction and pair hopping in the Extended Hubbard Model
论文作者
论文摘要
具有吸引人的密度密度相互作用，正对跳跃或两者兼而有之的扩展哈伯德模型可容纳拓扑阶段，并具有双重变性的纠缠谱和相互作用的边缘旋转。这构成了拓扑顺序的新颖实例，它来自相互作用。当相互作用术语以电荷-SU（2）对称方式结合在一起时，出现了一种新颖的部分极化伪阶段，其中自由度自由度的拓扑特征与远程$η$ - $波超导性共存。因此，我们的系统提供了一个示例，说明了自发对称性破坏与对称性保护的拓扑顺序，从而导致新颖和意外的特性。
The extended Hubbard model with an attractive density-density interaction, positive pair hopping, or both, is shown to host topological phases, with a doubly degenerate entanglement spectrum and interacting edge spins. This constitutes a novel instance of topological order which emerges from interactions. When the interaction terms combine in a charge-SU(2) symmetric fashion, a novel partially polarized pseudospin phase appears, in which the topological features of the spin degrees of freedom coexist with long-range $η$-wave superconductivity. Thus, our system provides an example of an interplay between spontaneous symmetry breaking and symmetry-protected topological order that leads to novel and unexpected properties.
