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Origin of the Drude peak and of zero sound in probe brane holography

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arxiv 1709.01520 v1 pith:YUFRXHMY submitted 2017-09-05 hep-th cond-mat.str-el

Origin of the Drude peak and of zero sound in probe brane holography

classification hep-th cond-mat.str-el
keywords branecurrentprobezeroappearsdrudeoperatorpeak
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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At zero temperature, the charge current operator appears to be conserved, within linear response, in certain holographic probe brane models of strange metals. At small but finite temperature, we analytically show that the weak non-conservation of this current leads to both a collective "zero sound" mode and a Drude peak in the electrical conductivity. This simultaneously resolves two outstanding puzzles about probe brane theories. The nonlinear dynamics of the current operator itself appears qualitatively different.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Linear response beyond hydrodynamic poles

    hep-th 2025-12 unverdicted novelty 7.0

    Constructs a derivative expansion for linear response that matches multi-pole correlators while preserving hydrostaticity, then applies it to D3/D5 probe brane charge fluctuations to study quasihydrodynamic transport ...

  2. Holographic D-brane constructions with dynamical gauge fields

    hep-th 2025-06 unverdicted novelty 6.0

    Equips bottom-up holographic D-brane models with dynamical boundary gauge fields and shows that quasinormal mode dispersion relations in equilibrium and nonequilibrium states match hydrodynamics with dynamical U(1) symmetry.