Collective modes of polarizable holographic media in magnetic fields
Artikel i vetenskaplig tidskrift, 2021

We consider a neutral holographic plasma with dynamical electromagnetic interactions in a finite external magnetic field. The Coulomb interactions are introduced via mixed boundary conditions for the Maxwell gauge field. The collective modes at finite wave-vector are analyzed in detail and compared to the magneto-hydrodynamics results valid only at small magnetic fields. Surprisingly, at large magnetic field, we observe the appearance of two plasmon-like modes whose corresponding effective plasma frequency grows with the magnetic field and is not supported by any background charge density. Finally, we identify a mode collision which allows us to study the radius of convergence of the linearized hydrodynamics expansion as a function of the external magnetic field. We find that the radius of convergence in momentum space, related to the diffusive transverse electromagnetic mode, increases quadratically with the strength of the magnetic field.

AdS-CFT Correspondence

Gauge-gravity correspondence

Holography and condensed matter physics (AdS/CMT)


Matteo Baggioli

Shanghai Jiao Tong University

Chinese Academy of Sciences

CSIC-UAM - Instituto de Fisica Teorica (IFT)

Ulf Gran

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Marcus Tornsö

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Journal of High Energy Physics

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

Vol. 2021 6 14


Annan fysik

Fusion, plasma och rymdfysik

Den kondenserade materiens fysik



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