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arXiv 1211.0109hep-thgr-qc
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AdS边界上的引力子多点函数

Graviton multi-point functions at the AdS boundary

Ram Brustein, A. J. M. Medved

摘要:

规范-重力对偶性可用于将强耦合流体的应力张量的连通多点引力子函数与连通多点关联函数联系起来。在这里,我们展示了如何为一个特定的运动学机制,是理想的区分不同的引力理论,特别是爱因斯坦理论和它的领先阶弦论校正之间的连接引力子函数。我们的分析从反德西特黑膜背景中的单粒子不可约引力子振幅开始。我们展示了如何使用这些来计算连接的引力子函数,并证明了这两种类型的振幅在某些情况下是一致的。然后,它是断言在物理上的理由,这种协议坚持在所有情况下,爱因斯坦引力和其领先的顺序修正。这个结果意味着相应的场论关联函数可以直接从体拉格朗日量中读出,就像剪切粘度与熵密度之比一样。

英文摘要:

The gauge-gravity duality can be used to relate connected multi-point graviton functions to connected multi-point correlation functions of the stress tensor of a strongly coupled fluid. Here, we show how to construct the connected graviton functions for a particular kinematic regime that is ideal for discriminating between different gravitational theories; in particular, between Einstein theory and its leading-order string theory correction. Our analysis begins with the one-particle irreducible graviton amplitudes in an anti-de Sitter black brane background. We show how these can be used to calculate the connected graviton functions and demonstrate that the two types of amplitudes agree in some cases. It is then asserted on physical grounds that this agreement persists in all cases for both Einstein gravity and its leading-order correction. This outcome implies that the corresponding field-theory correlation functions can be read directly off from the bulk Lagrangian, just as can be done for the ratio of the shear viscosity to the entropy density.

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