Weakly perturbed spin systems exhibit either confined chaos (Lyapunov time much shorter than thermalization time) or deconfined chaos (same timescale); the central spin model's maximal superintegrability at zero energy explains the latter.
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Confined and deconfined chaos in classical spin systems
Weakly perturbed spin systems exhibit either confined chaos (Lyapunov time much shorter than thermalization time) or deconfined chaos (same timescale); the central spin model's maximal superintegrability at zero energy explains the latter.