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arXiv 1111.2606hep-thcond-mat.str-el
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全息费米面的分形化

Fractionalization of holographic Fermi surfaces

Sean A. Hartnoll, Liza Huijse

摘要:

物质的零温态可以用具有渐近电通量的时空全息描述。这种通量可以来源于大量的显式带电物质场,极端的黑洞视界,或两者的组合。我们把它们分别称为物质的介子相、完全分馏相和部分分馏相。通过将费米子带电流体与渐近AdS_4 Einstein-Maxwell-Maxwell理论耦合,我们展示了这三个相之间的量子相变。分馏的开始可以是一阶或连续的相变。在后一种情况下,在量子临界点的理论显示出一个紧急的Lifshitz标度对称的IR。

英文摘要:

Zero temperature states of matter are holographically described by a spacetime with an asymptotic electric flux. This flux can be sourced either by explicit charged matter fields in the bulk, by an extremal black hole horizon, or by a combination of the two. We refer to these as mesonic, fully fractionalized and partially fractionalized phases of matter, respectively. By coupling a charged fluid of fermions to an asymptotically AdS_4 Einstein-Maxwell-dilaton theory, we exhibit quantum phase transitions between all three of these phases. The onset of fractionalization can be either a first order or continuous phase transition. In the latter case, at the quantum critical point the theory displays an emergent Lifshitz scaling symmetry in the IR.

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