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arXiv 1102.3908hep-th
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全息费米面与体偶极耦合

Holographic Fermi surfaces and bulk dipole couplings

David Guarrera, John McGreevy

摘要:

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性质受涌现尺度不变性控制。在回顾了这些发展之后,我们将全息计算推广到包括在体作用量中的主导无关算子,这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达到的低能标度维数,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的结构在这种变形下是稳健的。

英文摘要:

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.

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