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从编织融合范畴对Kitaev蜂窝模型的推广

Generalizations of Kitaev's honeycomb model from braided fusion categories

Luisa Eck, Paul Fendley

AI总结:

本文基于编织融合1-范畴在蜂窝晶格上构造融合表面模型,统一描述Kitaev蜂窝模型及其推广,并给出三个具体例子以研究手征拓扑序和不可逆1-形式对称性。

摘要:

由Inamura和Ohmori引入的融合表面模型将任意子链的概念推广到2+1维,并以融合2-范畴作为输入。在这项工作中,我们在由编织融合1-范畴构建的蜂窝晶格上构造并分析了融合表面模型。这些模型保持相互对易的plaquette算符和反常1-形式对称性。其哈密顿量被选择来模拟Kitaev蜂窝模型的结构,该模型与Ising融合表面模型幺正等价。在各向异性极限下,当一个耦合常数占主导时,融合表面模型约化为Levin-Wen弦网模型。在各向同性极限下,它们由弱耦合的任意子链描述,并且很可能实现手征拓扑序。我们重点关注三个具体例子:(i) 带有破坏时间反演对称性的微扰的Kitaev蜂窝模型,它实现手征Ising拓扑序;(ii) 由Barkeshli等人提出的$\mathbb{Z}_N$推广,它可能实现手征parafermion拓扑序;(iii) 一个新颖的具有不可逆1-形式对称性的Fibonacci蜂窝模型。

英文摘要:

Fusion surface models, as introduced by Inamura and Ohmori, extend the concept of anyon chains to 2+1 dimensions, taking fusion 2-categories as their input. In this work, we construct and analyze fusion surface models on the honeycomb lattice built from braided fusion 1-categories. These models preserve mutually commuting plaquette operators and anomalous 1-form symmetries. Their Hamiltonian is chosen to mimic the structure of Kitaev's honeycomb model, which is unitarily equivalent to the Ising fusion surface model. In the anisotropic limit, where one coupling constant is dominant, the fusion surface models reduce to Levin-Wen string-nets. In the isotropic limit, they are described by weakly coupled anyon chains and are likely to realize chiral topological order. We focus on three specific examples: (i) Kitaev's honeycomb model with a perturbation breaking time-reversal symmetry that realizes chiral Ising topological order, (ii) a $\mathbb{Z}_N$ generalization proposed by Barkeshli et al., which potentially realizes chiral parafermion topological order, and (iii) a novel Fibonacci honeycomb model featuring a non-invertible 1-form symmetry.

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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