Universal dynamics in an isolated quantum many body system far from equilibrium
This event is part of the Condensed Matter Theory Seminar Series.
We provide experimental evidence of universal dynamics far from equilibrium during the relaxation of an isolated one-dimensional Bose gas. Following a rapid cooling quench, the system exhibits universal scaling in time and space, associated with the approach of a non-thermal fixed point. The time evolution within the scaling period is described by a single universal function and scaling exponent, independent of the species of the initial state. Our results provide a quantum simulation in a regime, where to date no theoretical predictions are available. This constitutes a crucial step in the verification of universality far from equilibrium. If successful, this may lead to a comprehensive classification of systems based on their universal properties far from equilibrium, relevant for a large variety of systems at different scales.
This work was supported by the ERC (QuantumRelax) and the DFG/FWF SFB ISOQUANT.
S. Erne et al. arXiv:1805.12310