Universal dynamics of heavy operators in CFT2

Universal dynamics of heavy operators in CFT2
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CFT2 中重算子的通用动力学

DOI:
10.1007/jhep07(2020)074
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发表时间:
2020
影响因子:
5.4
通讯作者:
Tsiares, Ioannis
Tsiares, Ioannis
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Collier, Scott;Maloney, Alexander;Maxfield, Henry;Tsiares, Ioannis

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我们得到了具有c> 1的任意酉紧二维CFT的算子积展开系数平均值的渐近公式。当一个或多个算子具有较大的维数或存在扭隙时具有较大的自旋时,此公式有效。我们的公式是普遍的,因为它只取决于中心电荷,而不取决于理论的任何其他细节。该结果统一了以往CFT2结构常数的渐近公式,包括四点函数的交叉对称公式、环面相关函数的模协方差公式和高格模不变性公式。我们通过推导高格交叉方程的交叉核来确定有限中心电荷下的这个公式,即使在没有确切的共形块知识的情况下,也可以对结构常数进行解析控制。将环面单点函数的四点交叉和模变换的初等核拼接在一起,得到了高格模核。我们的渐近公式与Liouville理论的结构常数的DOZZ公式有关,并且精确地说明了Liouville理论在任何CFT中控制重算符的普遍动力学的意义。大中心电荷极限提供了与三维引力的联系,其中重态的平均对应于全息理论中黑洞微态的粗粒化。我们的公式还提供了对CFT 2中的特征态热化假设(ETH)的更好理解,并表明ETH可以推广到二维CFT中的其他运动状态。
We obtain an asymptotic formula for the average value of the operator product expansion coefficients of any unitary, compact two dimensional CFT with c> 1. This formula is valid when one or more of the operators has large dimension or—in the presence of a twist gap—has large spin. Our formula is universal in the sense that it depends only on the central charge and not on any other details of the theory. This result unifies all previous asymptotic formulas for CFT2 structure constants, including those derived from crossing symmetry of four point functions, modular covariance of torus correlation functions, and higher genus modular invariance. We determine this formula at finite central charge by deriving crossing kernels for higher genus crossing equations, which give analytic control over the structure constants even in the absence of exact knowledge of the conformal blocks. The higher genus modular kernels are obtained by sewing together the elementary kernels for four-point crossing and modular transforms of torus one-point functions. Our asymptotic formula is related to the DOZZ formula for the structure constants of Liouville theory, and makes precise the sense in which Liouville theory governs the universal dynamics of heavy operators in any CFT. The large central charge limit provides a link with 3D gravity, where the averaging over heavy states corresponds to a coarse-graining over black hole microstates in holographic theories. Our formula also provides an improved understanding of the Eigenstate Thermalization Hypothesis (ETH) in CFT 2, and suggests that ETH can be generalized to other kinematic regimes in two dimensional CFTs.
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