标题： 从世界线看整体的观点 显示英文标题

标题： A view of the bulk from the worldline

摘要： 介绍了一种计算一般维度下AdS$_{d+1}$中相关函数的新方法，考虑了在量子场论的世界线形式主义中被量化的一个粒子与体场耦合，特别是以标准方式被量化的引力。 这给出了一个由小参数$G_N$和粒子的逆质量组织的系统性双参数微扰展开，这与通常的威滕图展开互补。 这与共形场论的语言紧密相连，在全局共形块的测地线威滕图表示自然出现的情况下，对于二维情况，给出了Virasoro块的体表示，并提供了计算量子修正的系统方法。 全局共形块和其他贡献在任意维度的相关函数中被证明是指数化的，对应于任意圈阶威滕图的部分。 显示英文摘要

摘要： A new method to compute correlation functions in AdS$_{d+1}$ in general dimension is introduced, considering a particle quantised in the worldline formalism of quantum field theory, coupled to bulk fields, in particular gravity, quantised in the standard manner. This gives a systematic two-parameter perturbative expansion organised by small parameters $G_N$ and the inverse mass of the particle, complementary to the usual Witten diagram expansion. This connects closely to CFT language, with the geodesic Witten diagram representation of global conformal blocks emerging naturally, and for two dimensions gives a bulk representation of the Virasoro block, with a systematic method for computing quantum corrections. The global conformal block and other contributions are shown to exponentiate in correlation functions in any dimension, corresponding to pieces of Witten diagrams at arbitrary loop order.