arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0810.5394hep-thcond-mat.dis-nngr-qc
收藏

无序系统与AdS/CFT中的复制方法

Disordered Systems and the Replica Method in AdS/CFT

Mitsutoshi Fujita, Yasuaki Hikida, Shinsei Ryu, Tadashi Takayanagi

摘要:

基于复型方法和AdS/CFT对应,我们给出了共形场论中无序效应的全息描述。从共形场论的$n$副本开始,用双迹算子的变形描述高斯分布的随机性。在计算物理量之后,我们在最后一步取$n \to 0$极限。利用全息复制法和共形场论中的公式计算了无序系统中的关联函数。我们发现的例子中,无序急剧变化的缩放两个点函数。本文还讨论了无序系统中有效中心电荷的重整化群流。

英文摘要:

We formulate a holographic description of effects of disorder in conformal field theories based on the replica method and the AdS/CFT correspondence. Starting with $n$ copies of conformal field theories, randomness with a gaussian distribution is described by a deformation of double trace operators. After computing physical quantities, we take the $n \to 0$ limit at the final step. We compute correlation functions in the disordered systems by using the holographic replica method as well as the formulation in the conformal field theory. We find examples where disorder changes drastically the scaling of two point functions. The renormalization group flow of the effective central charge in our disordered systems is also discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑