arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2006.00159cond-mat.str-elhep-th
收藏

(3+1)d拓扑超导体的交换投影模型

Commuting projector models for (3+1)d topological superconductors via string net of (1+1)d topological superconductors

Ryohei Kobayashi

摘要:

本文讨论了(3+1)d拓扑超导体DIII类的交换投影哈密顿模型的构造方法。波函数由一种Kitaev线的弦网给出,装饰在时间反演(T)域壁上。我们的哈密顿量是提供一个通用的3D流形上配备了一个离散形式的自旋结构。我们将看到3d自旋结构如何在T畴壁上诱导出2d自旋结构(在2d晶格上称为Kasteleyn方向),这使得在T畴壁上定义波动的Kitaev线成为可能。在我们的模型中,当T对称性破缺时,我们发现在时间反演域壁上定义的对称性的未破缺的残余。域壁支持由不破缺对称性保护的2d非平凡SPT,这使我们能够根据Hason,Komargodski和Thorngren最近的QFT论点确定我们模型的SPT分类。

英文摘要:

We discuss a way to construct a commuting projector Hamiltonian model for a (3+1)d topological superconductor in class DIII. The wave function is given by a sort of string net of the Kitaev wire, decorated on the time reversal (T) domain wall. Our Hamiltonian is provided on a generic 3d manifold equipped with a discrete form of the spin structure. We will see how the 3d spin structure induces a 2d spin structure (called a Kasteleyn direction on a 2d lattice) on T domain walls, which makes possible to define fluctuating Kitaev wires on them. Upon breaking the T symmetry in our model, we find the unbroken remnant of the symmetry which is defined on the time reversal domain wall. The domain wall supports the 2d non-trivial SPT protected by the unbroken symmetry, which allows us to determine the SPT classification of our model, based on the recent QFT argument by Hason, Komargodski, and Thorngren.

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。

↑