Erlangen 2022 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 20: Quantum Gases I

Q 20.2: Poster

Tuesday, March 15, 2022, 16:30–18:30, P

Far-from-equilibrium dynamics of the sine-Gordon model — •Philipp Heinen, Aleksandr Mikheev, and Thomas Gasenzer — Kirchhoff-Institut für Physik, Universität Heidelberg

The sine-Gordon (SG) model, a quantum field theory with a cosine interaction potential, has applications in numerous fields of physics. In the context of condensed-matter physics it is particularly well known because it provides a dual description to quantum vortex ensembles. We have studied the far-from-equilibrium dynamics of the SG model both analytically and numerically and show that it exhibits universal dynamics in the vicinity of a non-thermal fixed point (NTFP), which has been described previously for other models. However, we here find an anomalously small temporal and anomalously large spatial scaling exponent. We attribute these to the interaction vertices of arbitrary high order that are present in the SG action.