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arXiv 2101.03385hep-thcond-mat.str-el
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使用大PDMATHAAD共形引导的手征XY模型中PDMATHAAB处的临界指数$η$

Critical exponent $η$ at $O(1/N^3)$ in the chiral XY model using the large $N$ conformal bootstrap

J. A. Gracey

摘要:

我们计算了$d$维手性XY或手性Gross-Neveu模型中临界指数$η$的$O(1/N^3)$修正。由于首阶顶点反常维数为零,直接应用大$N$共形引导形式主义是不可能的。为了避免这一点,我们考虑更一般的Nambu-Jona-Lasinio模型的一般非阿贝尔李群。取这个模型的指数的阿贝尔极限产生手征XY模型的指数。随后,我们提供了改进的估计$η$在三维手性XY模型的各种值的$N$。

英文摘要:

We compute the $O(1/N^3)$ correction to the critical exponent $η$ in the chiral XY or chiral Gross-Neveu model in $d$-dimensions. As the leading order vertex anomalous dimension vanishes, the direct application of the large $N$ conformal bootstrap formalism is not immediately possible. To circumvent this we consider the more general Nambu-Jona-Lasinio model for a general non-abelian Lie group. Taking the abelian limit of the exponents of this model produces those of the chiral XY model. Subsequently we provide improved estimates for $η$ in the three dimensional chiral XY model for various values of $N$.

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