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Holographic plasmon relaxation with and without broken translations
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Number of Authors: 52019 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 9, article id 013Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2019. no 9, article id 013
Keywords [en]
Holography and condensed matter physics (AdS, CMT), Gauge-gravity correspondence
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-174933DOI: 10.1007/JHEP09(2019)013ISI: 000485045700001OAI: oai:DiVA.org:su-174933DiVA, id: diva2:1368514
Available from: 2019-11-07 Created: 2019-11-07 Last updated: 2019-12-04Bibliographically approved

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Zingg, Tobias
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Nordic Institute for Theoretical Physics (Nordita)
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