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arXiv 2103.02713cond-mat.str-elhep-th
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II型分形子的场论

Field Theories for type-II fractons

Weslei B. Fontana, Pedro R. S. Gomes, Claudio Chamon

摘要:

从格点上的Haah码出发,导出了II型分形子的有效场论。有效拓扑理论并不是完全按照作用量给出的;它必须补充一个选择物理状态的条件。如果没有约束,动作只描述I型分形子。约束出现的条件,立方运算乘以单位元,它不能始终实现在连续统理论在运营商的水平,但只有在一个较弱的形式,在物理状态的矩阵元素。通过这些研究,并从相反的一端开始,即,连续,我们讨论了陈-西蒙斯一样的理论,不需要一个约束或投影仪,但没有移动的激发。这个连续统理论是否承认晶格对应物仍然没有答案。

英文摘要:

We derive an effective field theory for a type-II fracton starting from the Haah code on the lattice. The effective topological theory is not given exclusively in terms of an action; it must be supplemented with a condition that selects physical states. Without the constraint, the action only describes a type-I fracton. The constraint emerges from a condition that cube operators multiply to the identity, and it cannot be consistently implemented in the continuum theory at the operator level, but only in a weaker form, in terms of matrix elements of physical states. Informed by these studies and starting from the opposite end, i.e., the continuum, we discuss a Chern-Simons-like theory that does not need a constraint or projector, and yet has no mobile excitations. Whether this continuum theory admits a lattice counterpart remains unanswered.

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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