Speaker
Dr
Steven Mathey
(Institute for Theoretical Physics Cologne)
Description
I investigate the critical dynamics of a periodically driven Bose gas. The inclusion of dissipation enables the system to reach a far-from-equilibrium steady state where the periodic drive plays an essential role. Combining the Renormalization Group (RG) and Floquet formalisms, I describe the steady state by allowing for an arbitrary number of Floquet modes to be occupied. In practice, this means that the coupling constants become periodic functions of time as they are renormalized. As a first step, the RG flow equations are computed at one-loop. They are then linearised at the (Wilson-Fisher) equilibrium fixed point and an infinite number of relevant directions emerge because of the non-equilibrium drive.
Author
Dr
Steven Mathey
(Institute for Theoretical Physics Cologne)
Co-author
Prof.
Sebastian Diehl
(Institute for Theoretical Physics Cologne)
