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arXiv 2010.01136hep-thcond-mat.str-el
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(1+1)d理论的对称与反常:2-群与对称分数次化

Symmetries and Anomalies of (1+1)d Theories: 2-groups and Symmetry Fractionalization

Matthew Yu

摘要:

我们研究了(1+1)d理论中离散零形式和一形式整体对称性的相互作用。重点放在相互作用的对称性,可以在彼此上,这在这个低维的结果在2群对称性或对称分解。讨论的很大一部分将是理解(1+1)d的一个主要特征:理论分解成的多个部分。我们进行测量的一种形式的对称性,并评论这对我们的理论的影响,特别是在有一个全球2群对称的情况下。我们还实现了频谱序列计算异常的2群理论和对称分式理论的玻色子和费米的情况下。最后,我们讨论了实现对称性的算子上的拓扑操纵,并通过耦合到散装(2+1)d理论来了解这种操纵的(1+1)d效应。

英文摘要:

We investigate the interactions of discrete zero-form and one-form global symmetries in (1+1)d theories. Focus is put on the interactions that the symmetries can have on each other, which in this low dimension result in 2-group symmetries or symmetry fractionalization. A large part of the discussion will be to understand a major feature in (1+1)d: the multiple sectors into which a theory decomposes. We perform gauging of the one-form symmetry, and remark on the effects this has on our theories, especially in the case when there is a global 2-group symmetry. We also implement the spectral sequence to calculate anomalies for the 2-group theories and symmetry fractionalized theory in the bosonic and fermionic cases. Lastly, we discuss topological manipulations on the operators which implement the symmetries, and draw insights on the (1+1)d effects of such manipulations by coupling to a bulk (2+1)d theory.

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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