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arXiv 1604.01774hep-th
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三维重力场的半经典OPE系数

Semiclassical OPE coefficients from 3D gravity

Chi-Ming Chang, Ying-Hsuan Lin

摘要:

我们提出了一个封闭的形式表示的半经典OPE系数,是普遍的所有二维CFTs与“弱”的光谱,通过采取融合核的半经典极限。我们匹配一个适当的正则化和规范化的散装行动上评估的几何形状与三个圆锥形的缺陷,分析继续在赤字的角度超出的范围内存在一个度量与积极的签名。解析连续的几何形状有一个余维一坐标奇点周围的最重的圆锥形缺陷。这个奇点在威克旋转到洛仑兹签名之后变成了视界,这表明了普遍性和视界存在之间的联系。

英文摘要:

We present a closed form expression for the semiclassical OPE coefficients that are universal for all 2D CFTs with a "weak" light spectrum, by taking the semiclassical limit of the fusion kernel. We match this with a properly regularized and normalized bulk action evaluated on a geometry with three conical defects, analytically continued in the deficit angles beyond the range for which a metric with positive signature exists. The analytically continued geometry has a codimension-one coordinate singularity surrounding the heaviest conical defect. This singularity becomes a horizon after Wick rotating to Lorentzian signature, suggesting a connection between universality and the existence of a horizon.

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