Holographic plasmon relaxation with and without broken translations

• DOI: 10.1007/jhep09(2019)013
• Publication Date: 2019-09-07T05:53:52Z
• Authors: Matteo Baggioli; Ulf Gran; Amadeo Jimenez Alba; Marcus Tornsö; Tobias Zingg
• Keywords: Translational symmetry

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