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arXiv 2212.04076hep-thcond-mat.stat-mechcond-mat.str-el
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共形场论中带线缺陷的O$(N)$模型的ε展开

The epsilon expansion of the O$(N)$ model with line defect from conformal field theory

Tatsuma Nishioka, Yoshitaka Okuyama, Soichiro Shimamori

AI总结:

本文利用Rychkov-Tan公理化框架研究$(4-ε)$维带线缺陷的临界O$(N)$矢量模型,无需图形计算即唯一确定缺陷耦合临界值,并重现了各类缺陷局域算符的领头阶反常量纲。

摘要:

我们运用Rychkov和Tan的公理化框架,研究$(4-ε)$维中带有线缺陷的临界O$(N)$矢量模型。我们假设该不动点由缺陷共形场论描述,并证明缺陷耦合与体场耦合的临界值无需借助图形计算即可唯一确定。我们还利用公理化方法研究了各种缺陷局域算符,其中关联函数的解析性在确定缺陷复合算符的共形维数时起着关键作用。在所有情形中,包括存在算符混合的算符,我们都重现了微扰计算所给出的领头阶反常量纲。

英文摘要:

We employ the axiomatic framework of Rychkov and Tan to investigate the critical O$(N)$ vector model with a line defect in $(4-ε)$ dimensions. We assume the fixed point is described by defect conformal field theory and show that the critical value of the defect coupling to the bulk field is uniquely fixed without resorting to diagrammatic calculations. We also study various defect localized operators by the axiomatic method, where the analyticity of correlation functions plays a crucial role in determining the conformal dimensions of defect composite operators. In all cases, including operators with operator mixing, we reproduce the leading anomalous dimensions obtained by perturbative calculations.

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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