Speaker
Description
The functional renormalization group (FRG) formulated in real time on the Schwinger-Keldysh closed-time path provides an excellent calculational tool for real-time quantities such as spectral functions and transport coefficients, and in particular for their universal static and dynamic scaling behavior near a critical point. In this talk I will present the novel formulation of FRG flows in Minkowski spacetime, which consists of interpreting the corresponding causal regulator as a coupling to a fictitious external heat bath with FRG scale dependent spectral distribution. As particular applications, I will give a brief overview on some of the dynamic universality classes relevant for QCD, and outline how they can be implemented within the real-time FRG. With this setup, I will present results demonstrating the generation of dynamic scaling behavior in spectral functions obtained from one and two-loop self-consistent truncation schemes.
