English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We study the shear momentum diffusion and related modes of a strongly coupled$(2+1)$-dimensional conformal field theory at finite temperature and chemicalpotential, using a dual holographic description. We consider a space-timefilling charged black brane solution of Einstein's gravity in$(3+1)$-dimensional asymptotically Anti-de Sitter space coupled to a $U(1)$gauge field via a Dirac-Born-Infeld action. In addition to temperature andchemical potential, the holographic model has two other parameters: the tensionof the brane, and the non-linearity parameter controlling the higher-derivativeterms of the $U(1)$ field. By varying the parameters, one can, in particular,interpolate between the Reissner-Nordstrom-AdS background and the background ofprobe branes embedded into AdS space. We find analytically the retardedtwo-point functions of the shear (transverse to the direction of spatialmomentum) components of the energy-momentum tensor and the global $U(1)$current of the $(2+1)$-dimensional field theory in the hydrodynamicapproximation. We also find numerically the location of the poles of thecorrelators (quasinormal modes) for a wide range of the parameters, focusing onthe effects of the back-reaction and non-linearities. We show, in particular,that the shear diffusion constant agrees with the hydrodynamic form for a widerange of parameters, including temperature and backreaction.

Quasinormal Modes and Correlators in the Shear Channel of Spacetime-Filling Branes