Speaker
Ines Aniceto
(Southampton University, UK)
Description
In this talk I will study perturbations of Yang-Mills plasma, represented by scalar quasi-
normal modes of AdS black branes, as functions of the wave number q . This will be done using a combination of Seiberg-Witten and exact WKB approaches. The instanton expansion naturally provides an analytic understanding of the validity of the classical spectral methods based on the truncation of the boundary value problem. I will then show that a large wave number asymptotic analysis based on exact WKB provides an alternative description that remains accurate far beyond the strict large-q regime, and that can be analytically continued in the entire range of q from zero to infinity.