Autor(es)

Finazzo, Stefano I. ; Rougemont, Romulo ; Zaniboni, Maicon ; Critelli, Renato ; Noronha, Jorge

• Tipo de documento: Artigo Científico
• Fonte: Journal of High Energy Physics; v. N/A, n. 1, p. 31-pg., 2017-01-30.

Resumo

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)

• 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
• Processo FAPESP: 16/09263-2 - Propriedades fora do equilíbrio do plasma de quarks e gluons fortemente acoplado
• Beneficiário: Renato Anselmo Judica Critelli
• Modalidade de apoio: Bolsas no Brasil - Doutorado