Fakultät für Physik und Astronomie
STEPHEN PHILLIPS hostreviews.co.uk / UNSPLASH

YRC Lunch Seminar: Bose Gas Far From Equilibrium

Dr. Maciej Galka , Physikalisches Institut, Universität Heidelberg

Understanding many-body systems far-from equilibrium is an outstanding challenge in physics. It was proposed that such systems generically feature dynamic scaling while approaching non-thermal fixed points and the associated scaling exponents would provide a classification of the non-equilibrium phenomena analogously to the equilibrium universality classes. I will present our experimental results with homogeneous two-dimensional Bose gas on two prototypical far-from-equilibrium problems: driven turbulence (1) and isolated-system coarsening (2). For the turbulence, we have observed two key phenomena associated with its development – the emergence of statistical isotropy under anisotropic forcing, and the spatiotemporal scaling of the momentum spectrum. For the coarsening we have observed universal dynamic scaling with exponents that match analytical non-equilibrium field theory predictions. For different initial states we reveal universal dynamics by accounting for state-dependent prescaling effects. The methods we introduce should be applicable to any quantitative study of far from equilibrium phenomena.

SFB1225 ISOQUANT
5 Feb 2024, 13:00
Institut für Theoretische Physik, PI, Goldene Box & Online via Zoom

Add to calendar Add to calendar