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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Momentum transport in strongly coupled anisotropic plasmas in the presence of strong magnetic fields

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Author(s):
Finazzo, Stefano Ivo ; Critelli, Renato ; Rougemont, Romulo ; Noronha, Jorge
Total Authors: 4
Document type: Journal article
Source: Physical Review D; v. 94, n. 5 SEP 19 2016.
Web of Science Citations: 37
Abstract

We present a holographic perspective on momentum transport in strongly coupled, anisotropic non-Abelian plasmas in the presence of strong magnetic fields. We compute the anisotropic heavy quark drag forces and Langevin diffusion coefficients and also the anisotropic shear viscosities for two different holographic models, namely, a top-down deformation of strongly coupled N = 4 super-Yang-Mills theory triggered by an external Abelian magnetic field, and a bottom-up Einstein-Maxwell-dilaton (EMD) model which is able to provide a quantitative description of lattice QCD thermodynamics with (2 + 1) flavors at both zero and nonzero magnetic fields. We find that, in general, energy loss and momentum diffusion through strongly coupled anisotropic plasmas are enhanced by a magnetic field being larger in transverse directions than in the direction parallel to the magnetic field. Moreover, the anisotropic shear viscosity coefficient is smaller in the direction of the magnetic field than in the plane perpendicular to the field, which indicates that strongly coupled anisotropic plasmas become closer to the perfect fluid limit along the magnetic field. We also present, in the context of the EMD model, holographic predictions for the entropy density and the crossover critical temperature in a wider region of the (T, B) phase diagram that has not yet been covered by lattice simulations. Our results for the transport coefficients in the phenomenologically realistic magnetic EMD model could be readily used as inputs in numerical codes for magnetohydrodynamics. (AU)

FAPESP's process: 15/00240-7 - Applications of the gauge/gravity duality in non-perturbative phenomena
Grantee:Stefano Ivo Finazzo
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/04036-0 - Computation of the properties of the quark-gluon plasma at nonzero temperature and baryonic density using the holographic correspondence
Grantee:Rômulo Cesar Rougemont Pereira
Support type: Scholarships in Brazil - Post-Doctorate