Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/126144
Title: | Transport peak in thermal spectral function of N=4 supersymmetric Yang-Mills plasma at intermediate coupling |
Author: | Casalderrey Solana, Jorge Grozdanov, Saso Starinets, Andrei O. |
Keywords: | Pertorbació (Dinàmica quàntica) Teoria quàntica de camps Supergravetat Perturbation (Quantum dynamics) Quantum field theory Supergravity |
Issue Date: | 9-Nov-2018 |
Publisher: | American Physical Society |
Abstract: | We study the structure of thermal spectral function of the stress-energy tensor in N=4 supersymmetric Yang-Mills theory at intermediate 't Hooft coupling and infinite number of colors. In gauge-string duality, this analysis reduces to the study of classical bulk supergravity with higher-derivative corrections, which correspond to (inverse) coupling corrections on the gauge theory side. We extrapolate the analysis of perturbative leading-order corrections to intermediate coupling by nonperturbatively solving the equations of motion of metric fluctuations dual to the stress-energy tensor at zero spatial momentum. We observe the emergence of a separation of scales in the analytic structure of the thermal correlator associated with two types of characteristic relaxation modes. As a consequence of this separation, the associated spectral function exhibits a narrow structure in the small frequency region which controls the dynamics of transport in the theory and may be described as a transport peak typically found in perturbative, weakly interacting thermal field theories. We compare our results with generic expectations drawn from perturbation theory, where such a structure emerges as a consequence of the existence of quasiparticles. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.121.191603 |
It is part of: | Physical Review Letters, 2018, vol. 121, p. 191603 |
URI: | http://hdl.handle.net/2445/126144 |
Related resource: | https://doi.org/10.1103/PhysRevLett.121.191603 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
683039.pdf | 350.65 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.