| Texto completo | |
| Autor(es): |
Finazzo, Stefano Ivo
;
Critelli, Renato
;
Rougemont, Romulo
;
Noronha, Jorge
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 94, n. 5, p. 35-pg., 2016-09-19. |
| Resumo | |
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) | |
| Processo FAPESP: | 15/00240-7 - Aplicações da dualidade gauge/gravity a fenômenos não-perturbativos |
| Beneficiário: | Stefano Ivo Finazzo |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 13/04036-0 - Cálculo das propriedades do plasma de quarks e glúons a temperatura e densidade bariônica finitas via holografia |
| Beneficiário: | Rômulo Cesar Rougemont Pereira |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |