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arXiv 2405.09754hep-thcond-mat.str-el
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(1+1)维费米子非可逆对称性:有能隙与无能隙相、相变以及对称性TFT

Fermionic Non-Invertible Symmetries in (1+1)d: Gapped and Gapless Phases, Transitions, and Symmetry TFTs

Lakshya Bhardwaj, Kansei Inamura, Apoorv Tiwari

AI总结:

该研究聚焦(1+1)维费米子非可逆对称性,借助SymTFT形式体系构建相图,阐明相的表征方式与费米子CFT的构造方法,并明确其与玻色子非可逆对称性的变换关联,完善了费米子对称性的范畴化朗道范式。

摘要:

我们研究(1+1)维中的费米子非可逆对称性,这类对称性是将费米子宇称对称性与其他可逆及非可逆内部对称性混合的广义全局对称性。此类对称性由费米子融合超范畴描述,即选定了费米子宇称的融合π-超范畴。本文的目标是完善费米子对称性的范畴化朗道范式。我们使用对称性拓扑场论(Symmetry Topological Field Theory, SymTFT)形式体系,研究这类对称性对应的可能有能隙相与无能隙相,以及这些相之间的可能形变,这些形变被组织为哈塞(Hasse)相图。这些相可以通过凝聚的、禁闭的和解禁闭的广义对称荷集合来表征,这与超导领域中常见的概念类似。许多无能隙相同时也充当有能隙相之间的相变点。相关的费米子共形场论(conformal field theories, CFTs)可以通过对描述更简单相变的玻色CFT执行广义费米子Kennedy-Tasaki(KT)变换得到。本文讨论的费米子非可逆对称性及其荷与相,都可以通过费米子化或Jordan-Wigner变换从玻色子非可逆对称性的对应内容得到,文中对此进行了详细讨论。

英文摘要:

We study fermionic non-invertible symmetries in (1+1)d, which are generalized global symmetries that mix fermion parity symmetry with other invertible and non-invertible internal symmetries. Such symmetries are described by fermionic fusion supercategories, which are fusion $π$-supercategories with a choice of fermion parity. The aim of this paper is to flesh out the categorical Landau paradigm for fermionic symmetries. We use the formalism of Symmetry Topological Field Theory (SymTFT) to study possible gapped and gapless phases for such symmetries, along with possible deformations between these phases, which are organized into a Hasse phase diagram. The phases can be characterized in terms of sets of condensed, confined and deconfined generalized symmetry charges, reminiscent of notions familiar from superconductivity. Many of the gapless phases also serve as phase transitions between gapped phases. The associated fermionic conformal field theories (CFTs) can be obtained by performing generalized fermionic Kennedy-Tasaki (KT) transformations on bosonic CFTs describing simpler transitions. The fermionic non-invertible symmetries along with their charges and phases discussed here can be obtained from those of bosonic non-invertible symmetries via fermionization or Jordan-Wigner transformation, which is discussed in detail.

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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