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arXiv 1707.03418hep-th
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双跟踪接口

Double Trace Interfaces

Charles Melby-Thompson, Cornelius Schmidt-Colinet

摘要:

本文引入并研究了两个全息共形理论之间的重整化群界面,这两个全息共形理论通过标量双迹算符的形变联系起来。在1/N展开的首阶,我们推导出标量的两点关联函数的表达式,以及生活在界面上的算子的谱。我们还计算了界面对球配分函数的贡献,该配分函数在二维中给出了边界g因子。检查我们的建议,包括再生的g因子和一些缺陷重叠系数的Gaiotto的RG接口在大N,和两点关联函数时,共形微扰理论是有效的。

英文摘要:

We introduce and study renormalization group interfaces between two holographic conformal theories which are related by deformation by a scalar double trace operator. At leading order in the 1/N expansion, we derive expressions for the two point correlation functions of the scalar, as well as the spectrum of operators living on the interface. We also compute the interface contribution to the sphere partition function, which in two dimensions gives the boundary g factor. Checks of our proposal include reproducing the g factor and some defect overlap coefficients of Gaiotto's RG interfaces at large N, and the two-point correlation function whenever conformal perturbation theory is valid.

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