| Full text | |
| Author(s): |
Finazzo, Stefano I.
;
Rougemont, Romulo
;
Zaniboni, Maicon
;
Critelli, Renato
;
Noronha, Jorge
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Journal of High Energy Physics; v. N/A, n. 1, p. 31-pg., 2017-01-30. |
| Abstract | |
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: | 15/00240-7 - Applications of the gauge/gravity duality in non-perturbative phenomena |
| Grantee: | Stefano Ivo Finazzo |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| 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 Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 16/09263-2 - Out-of-equilibrium properties of the strongly coupled quark-gluon plasma |
| Grantee: | Renato Anselmo Judica Critelli |
| Support Opportunities: | Scholarships in Brazil - Doctorate |