Thermalization slowing down of weakly nonintegrable quantum spin dynamics

B Bhattacharjee, A Andreanov, S Flach - arXiv preprint arXiv:2405.00786, 2024 - arxiv.org
We study thermalization slowing down of a quantum many-body system upon approach to
two distinct integrability limits. Motivated by previous studies of classical systems, we identify …

Observation of prethermalization in weakly nonintegrable unitary maps

X Zhang, GM Lando, B Dietz, S Flach - arXiv preprint arXiv:2501.07956, 2025 - arxiv.org
We investigate prethermalization by studying the statistical properties of the time-dependent
largest Lyapunov exponent $\Lambda (t) $ for unitary-circuit maps upon approaching …