Sergej Flach

Mar 25, 2024 | link.aps.org | Weihua Zhang |Gabriel M. Lando |Barbara Dietz |Sergej Flach

We study the disorder-induced crossover between the two recently discovered thermalization slowing-down universality classes, characterized by long- and short-range coupling, in classical unitary-circuit maps close to integrability. We compute Lyapunov spectra, which display qualitatively distinct features depending on whether the proximity to the integrable limit is short or long range. For sufficiently small nonlinearity, translationally invariant systems fall into the long-range class.