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arXiv 1801.01477hep-th
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共形相关的双迹形变

Double-Trace Deformations of Conformal Correlations

Simone Giombi, Vladimir Kirilin, Eric Perlmutter

摘要:

大$N$共形场论经常承认由双迹形变触发的酉重整化群流。我们在$1/N$中计算了双迹流下标量四点函数的变化。这在AdS中有一个简单的对偶,其中流动是通过改变边界条件来实现的,并提供了单值共形分波的物理解释。我们提取了双迹复合算子无穷族的共形维数和三点系数的变化。其中一些量被发现是双迹流下的符号确定。作为应用,我们导出了$O(N)$矢量模型中非单重态组成的自旋双迹算符的反常维数。

英文摘要:

Large $N$ conformal field theories often admit unitary renormalization group flows triggered by double-trace deformations. We compute the change in scalar four-point functions under double-trace flow, to leading order in $1/N$. This has a simple dual in AdS, where the flow is implemented by a change of boundary conditions, and provides a physical interpretation of single-valued conformal partial waves. We extract the change in the conformal dimensions and three-point coefficients of infinite families of double-trace composite operators. Some of these quantities are found to be sign-definite under double-trace flow. As an application, we derive anomalous dimensions of spinning double-trace operators comprised of non-singlet constituents in the $O(N)$ vector model.

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