论文标题
强耦合时热相关器的奇异性
Singularities of thermal correlators at strong coupling
论文作者
论文摘要
我们在有限温度下在共形场理论中分析了两点函数的奇异性。在自由理论中，唯一的奇异性是沿边界光锥。在全息限制中，出现了新的奇异性，因为两个边界点可以通过散装中的非平凡的无效测量线连接，从而包围了黑洞的光子球。我们表明，由于黑洞曲率而引起的潮汐效应可以解决这些新的奇异点，通过在Penrose限制中求解弦世界表格理论。还讨论了渐近平坦的黑洞几何形状中的奇异性。
We analyze the singularities of the two-point function in a conformal field theory at finite temperature. In a free theory, the only singularity is along the boundary light cone. In the holographic limit, a new class of singularities emerges since two boundary points can be connected by a nontrivial null geodesic in the bulk, encircling the photon sphere of the black hole. We show that these new singularities are resolved by tidal effects due to the black hole curvature, by solving the string worldsheet theory in the Penrose limit. Singularities in the asymptotically flat black hole geometry are also discussed.
