arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1601.01596cond-mat.str-elcond-mat.supr-con
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费米子相互作用拓扑相的维数等级

Dimensional hierarchy of fermionic interacting topological phases

Raquel Queiroz, Eslam Khalaf, Ady Stern

摘要:

我们提出了一个降维的论点,以获得费米对称性保护的拓扑相位的相互作用的存在下的分类约简。通过将$d$维系统的拓扑特征与其表面存在的零维拓扑缺陷处的零能量束缚态的数量相关联来进行降维。这种对应关系导致了一个一般的条件,对称性保持相互作用,使系统的拓扑平凡,并允许我们明确地写一个四次相互作用。我们的减少表明,拓扑不变小于$n$的所有阶段是拓扑不同的,从而减少非相互作用的$\mathbb{Z}$分类为$\mathbb{Z}_n$。

英文摘要:

We present a dimensional reduction argument to derive the classification reduction of fermionic symmetry protected topological phases in the presence of interactions. The dimensional reduction proceeds by relating the topological character of a $d$-dimensional system to the number of zero-energy bound states localized at zero-dimensional topological defects present at its surface. This correspondence leads to a general condition for symmetry preserving interactions that render the system topologically trivial, and allows us to explicitly write a quartic interaction to this end. Our reduction shows that all phases with topological invariant smaller than $n$ are topologically distinct, thereby reducing the non-interacting $\mathbb{Z}$ classification to $\mathbb{Z}_n$.

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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