Holographic plasmon relaxation with and without broken translations
Artikel i vetenskaplig tidskrift, 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)

Författare

Matteo Baggioli

CSIC-UAM - Instituto de Física Teórica (IFT)

Ulf Gran

Chalmers, Fysik, Teoretisk fysik

Amadeo Jimenez Alba

CSIC-UAM - Instituto de Física Teórica (IFT)

Marcus Tornsö

Chalmers, Fysik, Teoretisk fysik

T. Zingg

Kungliga Tekniska Högskolan (KTH)

Journal of High Energy Physics

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

Vol. 2019 9 13

Ämneskategorier

Annan fysik

Fusion, plasma och rymdfysik

Den kondenserade materiens fysik

DOI

10.1007/JHEP09(2019)013

Mer information

Senast uppdaterat

2019-11-10