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arXiv 1406.4142hep-th
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共形摄动理论、维数正则化与AdS/CFT

Conformal perturbation theory, dimensional regularization and AdS/CFT

David Berenstein, Alexandra Miller

摘要:

利用共形微扰理论研究了圆柱上共形场论的相应形变,特别是形变算符的单点函数和系统失超后的能量.我们做一个点函数计算在AdS和共形场论,我们表明,结果相匹配。我们的计算是在任意时空维度以及相关算子的任意标度维度下进行的。在最终计算中出现的唯一奇点可以与维数正则化中的对数奇点相关。我们还研究了依赖于时间的设置在场论,我们展示了如何系统的响应可以计算在一个基于哈密顿量的方法。我们用这个过程来解释某些短时间普遍的结果,已经发现以前。

英文摘要:

We study relevant deformations of conformal field theory on a cylinder using conformal perturbation theory, and in particular the one point function of the deformation operator and the energy in a system after a quench. We do the one point function calculation in both AdS and the conformal field theory and we show that the results match. Our calculations are done with arbitrary spacetime dimension, as well as arbitrary scaling dimension of the relevant operator. The only singularities that appear in the end calculation can be related to logarithmic singularities in dimensional regularization. We also study time dependent setups in the field theory and we show how the response of the system can be calculated in a Hamiltonian based approach. We use this procedure to explain certain short time universal results that have been found previously.

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