Holographic plasmon relaxation with and without broken translations
Journal article, 2019

We study the dynamics and the relaxation of bulk plasmons in strongly coupled and quantum critical systems using the holographic framework. We analyze the dispersion relation of the plasmonic modes in detail for an illustrative class of holographic bottom-up models. Comparing to a simple hydrodynamic formula, we entangle the complicated interplay between the three least damped modes and shed light on the underlying physical processes. Such as the dependence of the plasma frequency and the effective relaxation time in terms of the electromagnetic coupling, the charge and the temperature of the system. Introducing momentum dissipation, we then identify its additional contribution to the damping. Finally, we consider the spontaneous symmetry breaking (SSB) of translational invariance. Upon dialing the strength of the SSB, we observe an increase of the longitudinal sound speed controlled by the elastic moduli and a decrease in the plasma frequency of the gapped plasmon. We comment on the condensed matter interpretation of this mechanism.

Gauge-gravity correspondence

Holography and condensed matter physics (AdS/CMT)


Matteo Baggioli

CSIC-UAM - Instituto de Física Teórica (IFT)

Ulf Gran

Chalmers, Physics, Theoretical Physics

Amadeo Jimenez Alba

CSIC-UAM - Instituto de Física Teórica (IFT)

Marcus Tornsö

Chalmers, Physics, Theoretical Physics

T. Zingg

Royal Institute of Technology (KTH)

Journal of High Energy Physics

1126-6708 (ISSN) 1029-8479 (eISSN)

Vol. 2019 9 13

Subject Categories

Other Physics Topics

Fusion, Plasma and Space Physics

Condensed Matter Physics



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