Strange Metals in One Spatial Dimension

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Strange Metals in One Spatial Dimension

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Title: Strange Metals in One Spatial Dimension
Author: Gopakumar, Rajesh; Hashimoto, Akikazu; Klebanov, Igor R.; Sachdev, Subir; Schoutens, Kareljan

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Citation: Gopakumar, Rajesh, Akikazu Hashimoto, Igor R. Klebanov, Subir Sachdev, and Kareljan Schoutens. 2012. Strange metals in one spatial dimension. Physical Review D 86(6): 066003.
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Abstract: We consider 1+1 dimensional SU(N) gauge theory coupled to a multiplet of massive Dirac fermions transforming in the adjoint representation of the gauge group. The only global symmetry of this theory is a U(1) associated with the conserved Dirac fermion number, and we study the theory at variable, nonzero densities. The high density limit is characterized by a deconfined Fermi surface state with Fermi wave vector equal to that of free gauge-charged fermions. Its low energy fluctuations are described by a coset conformal field theory with central charge c=(N\(^2\)-1)/3 and an emergent N=(2,2) supersymmetry: the U(1) fermion number symmetry becomes an R-symmetry. We determine the exact scaling dimensions of the operators associated with Friedel oscillations and pairing correlations. For N>2, we find that the symmetries allow relevant perturbations to this state. We discuss aspects of the N→∞ limit, and its possible dual description in AdS\(_3\) involving string theory or higher-spin gauge theory. We also discuss the low density limit of the theory by computing the low lying bound state spectrum of the large N gauge theory numerically at zero density, using discretized light cone quantization.
Published Version: doi:10.1103/PhysRevD.86.066003
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