Holographic Fermi surfaces and bulk dipole couplings
Holographic Fermi surfaces and bulk dipole couplings
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发表时间：
2011-02
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通讯作者：
David Guarrera;J. McGreevy
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作者：
David Guarrera;J. McGreevy
非费米液体可以用全息对偶来研究。全息费米面的低能物理受浮现尺度不变性的控制。在回顾了这些发展之后，我们推广了全息计算，在体作用中包含了前导无关算符，它是旋量场和背景规范场之间的偶极耦合。我们发现，这种偶极耦合改变了可获得的低能量标度维，并改变了费米面在动量空间中的位置。然而，非费米液体的全息框架结构在这种变形下是坚固的。
Non-Fermi liquids can be studied using holographic duality. The low energy physics of a holographic Fermi surface is controlled by an emergent scale invariance. After reviewing these developments, we generalize the holographic calculation to include in the bulk action the leading irrelevant operator, which is a dipole coupling between the spinor field and the background gauge field. We find that this dipole coupling changes the attainable low-energy scaling dimensions, and changes the locations of the Fermi surfaces in momentum space. The structure of the holographic framework for non-Fermi liquids is, however, robust under this deformation.