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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.)

Critical behavior of non-hydrodynamic quasinormal modes in a strongly coupled plasma

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Finazzo, Stefano I. ; Rougemont, Romulo ; Zaniboni, Maicon ; Critelli, Renato ; Noronha, Jorge
Total Authors: 5
Document type: Journal article
Source: Journal of High Energy Physics; n. 1 JAN 30 2017.
Web of Science Citations: 11

We study the behavior of quasinormal modes in a top-down holographic dual corresponding to a strongly coupled N = 4 super Yang-Mills plasma charged under a U(1) subgroup of the global SU(4) R-symmetry. In particular, we analyze the spectra of quasinormal modes in the external scalar and vector diffusion channels near the critical point and obtain the behavior of the characteristic equilibration times of the plasma as the system evolves towards the critical point of its phase diagram. Except close to the critical point, we observe that by increasing the chemical potential one generally increases the damping rate of the quasinormal modes, which leads to a reduction of the characteristic equilibration times in the dual strongly coupled plasma. However, as one approaches the critical point the typical equilibration time (as estimated from the lowest non-hydrodynamic quasinormal mode frequency) increases, although remaining finite, while its derivative with respect to the chemical potential diverges with exponent -1/2. We also find a purely imaginary non-hydrodynamical mode in the vector diffusion channel at nonzero chemical potential which dictates the equilibration time in this channel near the critical point. (AU)

FAPESP's process: 16/09263-2 - Out-of-equilibrium properties of the strongly coupled quark-gluon plasma
Grantee:Renato Anselmo Judica Critelli
Support type: Scholarships in Brazil - Doctorate
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