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论文类型：期刊论文

发表时间：2018-04-20

发表刊物：JOURNAL OF HIGH ENERGY PHYSICS

收录刊物：SCIE

期号：4

ISSN号：1029-8479

关键字：Holography and condensed matter physics (AdS/CMT); AdS-CFT Correspondence

摘要：Using holographic methods in the Einstein-Maxwell-dilaton-axion (EMDA) theory, it was conjectured that the thermal diffusion in a strongly coupled metal without quasi-particles saturates an universal lower bound that is associated with the chaotic property of the system at infrared (IR) fixed points [1]. In this paper, we investigate the thermal transport and quantum chaos in the EMDA theory with a small Weyl coupling term. It is found that the Weyl coupling correct the thermal diffusion constant D-Q and butterfly velocity v(B) in different ways, hence resulting in a modified relation between the two at IR fixed points. Unlike that in the EMDA case, our results show that the ratio D-Q/(v(B)(2)tau(L)) always contains a non-universal Weyl correction which depends also on the bulk fields as long as the U(1) current is marginally relevant in the IR.