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arXiv 1210.5000hep-th
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共形引力的费米面和解析格林函数

Fermi Surfaces and Analytic Green's Functions from Conformal Gravity

Jun Li, Hai-Shan Liu, H. Lu, Zhao-Long Wang

摘要:

在共形引力下构造了T^2对称带电AdS黑洞。最一般的解,直到一个整体的保形因子包含三个非平凡的参数:质量,电荷和一个量,可以确定为大量的自旋2头发。在此背景下,我们研究了带电无质量旋量的Dirac方程。该方程可以根据通用频率ω和波数k的通用Heun函数来求解。这使我们能够得到极值和非极值黑洞的解析格林函数G(ω,k)。对于某些特殊的后孔参数选择,我们发现格林函数可以简化为更简单的超几何函数或合流超几何函数。我们研究了ω为零的格林函数的极点所对应的费米面。我们发现的例子中,费米表面的非费米液体以及特征费米的可以出现。我们说明了非平凡的格林函数和费米面之间的极值和非极值黑洞的差异。

英文摘要:

We construct T^2-symmetric charged AdS black holes in conformal gravity. The most general solution up to an overall conformal factor contains three non-trivial parameters: the mass, electric charge and a quantity that can be identified as the massive spin-2 hair. We study the Dirac equation for the charged massless spinor in this background. The equation can be solved in terms of the general Heun's function for generic frequency ωand wave number k. This allows us to obtain the analytic Green's function G(ω, k) for both extremal and non-extremal black holes. For some special choice of back hole parameters, we find that the Green's function reduces to simpler hypergeometric or confluent hypergeometric functions. We study the Fermi surfaces associated with the poles of the Green's function with vanishing ω. We find examples where the Fermi surfaces for non-Fermi liquids as well as the characteristic Fermi ones can arise. We illustrate the non-trivial differences in the Green's function and Fermi surfaces between the extremal and non-extremal black holes.

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