论文标题
重型操作员和流体动力尾巴
Heavy Operators and Hydrodynamic Tails
论文作者
论文摘要
在有限温度下相互作用的QFT的较晚物理学由流体动力学控制。对于CFT而言，这意味着可以半经典地研究重型操作员（通常预期会产生热状态）。我们表明，流体动力学普遍固定OPE系数$ c_ {hh'l} $，平均而言，在所有具有两个非相同重型的中性光操作员中，取决于操作员的缩放维度和旋转。这些方法可以直接扩展到具有全局对称性的CFT，并将最新的EFT结果推广到大型电荷运算符上，远离固定电荷的最小尺寸的情况。我们还重新审视了QFT和其他扩散系统中晚期热相关器的某些方面。
The late time physics of interacting QFTs at finite temperature is controlled by hydrodynamics. For CFTs this implies that heavy operators -- which are generically expected to create thermal states -- can be studied semiclassically. We show that hydrodynamics universally fixes the OPE coefficients $C_{HH'L}$, on average, of all neutral light operators with two non-identical heavy ones, as a function of the scaling dimension and spin of the operators. These methods can be straightforwardly extended to CFTs with global symmetries, and generalize recent EFT results on large charge operators away from the case of minimal dimension at fixed charge. We also revisit certain aspects of late time thermal correlators in QFT and other diffusive systems.
