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arXiv · 1012.5681

Constructing the AdS dual of a Fermi liquid: AdS Black holes with Dirac hair

Mihailo Čubrović·Jan Zaanen·Koenraad Schalm
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Abstract

We provide new evidence that the holographic dual to a strongly coupled charged Fermi Liquid has a non-zero fermion density in the bulk. We show that the pole-strength of the stable quasiparticle characterizing the Fermi surface is encoded in the spatially averaged AdS probability density of a single normalizable fermion wavefunction in AdS. Recalling Migdal's theorem which relates the pole strength to the Fermi-Dirac characteristic discontinuity in the number density at $\ome_F$, we conclude that the AdS dual of a Fermi liquid is described by occupied on-shell fermionic modes in AdS. Encoding the occupied levels in the total probability density of the fermion field directly, we show that an AdS Reissner-Nordström black hole in a theory with charged fermions has a critical temperature, at which the system undergoes a first-order transition to a black hole with a non-vanishing profile for the bulk fermion field. Thermodynamics and spectral analysis confirm that the solution with non-zero AdS fermion-profile is the preferred ground state at low temperatures.

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Mihailo Čubrović, Jan Zaanen, Koenraad Schalm. 2011-07-28. Constructing the AdS dual of a Fermi liquid: AdS Black holes with Dirac hair. https://doi.org/10.1007/jhep10(2011)017

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