arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.01801cond-mat.str-el
收藏

用于相互作用的拓扑绝缘体的局部标记

Local marker for interacting topological insulators

Anton Markov, Alexey Rubtsov

摘要:

拓扑物质态首先被引入到无限均匀晶格上的非相互作用费米子中。从那时起,已经做出了大量的努力,将这些概念推广到更复杂的环境中。最近,局部标记已被开发出来,可以描述系统的拓扑状态没有平移对称性和明确的间隙。然而,还没有提出能够直接寻址相互作用系统的相互作用物质的局部标记。在这里,我们建议这样一个多体局部标记的基础上的单粒子格林函数。使用这个标记,我们确定在有限晶格的陈省身绝缘体与安德森障碍和哈伯德相互作用的拓扑转变。重要的是,我们的建议可以直接推广到非平衡系统。

英文摘要:

Topological states of matter were first introduced for non-interacting fermions on an infinite uniform lattice. Since then, substantial effort has been made to generalize these concepts to more complex settings. Recently, local markers have been developed that can describe the topological state of systems without translational symmetry and well-defined gap. However, no local marker for interacting matter has been proposed yet that is capable of directly addressing an interacting system. Here we suggest such a many-body local marker based on the single-particle Green's function. Using this marker we identify topological transitions in finite lattices of a Chern insulator with Anderson disorder and Hubbard interactions. Importantly, our proposal can be straightforwardly generalised to non-equilibrium systems.

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。

↑