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arXiv 2301.07899cond-mat.str-elhep-th
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SPT与SSB相之间的非对偶变换

Non-Invertible Duality Transformation Between SPT and SSB Phases

Linhao Li, Masaki Oshikawa, Yunqin Zheng

AI总结:

本文提出通过牺牲幺正性在闭合链上定义Kennedy-Tasaki变换,实现SPT与SSB相间的非可逆对偶映射,从而将其与广义规范等概念联系并开辟系统构造SPT相的途径。

摘要:

1992年,Kennedy和Tasaki构造了一个非局域幺正变换,在开自旋链上将$\mathbb{Z}_2\times \mathbb{Z}_2$自发对称性破缺相与Haldane能隙相(现代框架中典型的Symmetry-Protected Topological相)进行映射。在本工作中,我们提出了一种通过牺牲幺正性在闭合链上定义它的方法。实现这种非幺正变换的算符满足非可逆融合规则,并实现了$\mathbb{Z}_2\times \mathbb{Z}_2$全局对称性的广义规范。这些发现将Kennedy-Tasaki变换与为SPT相发展的众多其他概念联系起来,并开辟了使用对偶映射系统构造SPT相的途径。

英文摘要:

In 1992, Kennedy and Tasaki constructed a non-local unitary transformation that maps between a $\mathbb{Z}_2\times \mathbb{Z}_2$ spontaneously symmetry breaking phase and the Haldane gap phase, which is a prototypical Symmetry-Protected Topological phase in modern framework, on an open spin chain. In this work, we propose a way to define it on a closed chain, by sacrificing unitarity. The operator realizing such a non-unitary transformation satisfies non-invertible fusion rule, and implements a generalized gauging of the $\mathbb{Z}_2\times \mathbb{Z}_2$ global symmetry. These findings connect the Kennedy-Tasaki transformation to numerous other concepts developed for SPT phases, and opens a way to construct SPT phases systematically using the duality mapping.

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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