Correlations and Coherence at Different Scales (CCDS25)

Iconic features of classical dissipative dynamics include persistent
limit-cycle oscillations and critical slowing down at the onset of such
oscillations, whereby the system relaxes purely algebraically in time. On the other hand, quantum systems subject to generic Markovian dissipation decohere exponentially in time, approaching a unique steady state. We show how coherent limit-cycle oscillations and algebraic decay can emerge in a quantum system governed by a Markovian master equation. We illustrate these mechanisms using a single-spin model motivated by Landau-Lifshitz-Gilbert dynamics.