Thermalization slowing down of weakly nonintegrable quantum spin
dynamics
Thermalization slowing down of weakly nonintegrable quantum spin
dynamics
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 two thermalization time scales: one quantum Lyapunov time scale is extracted by quantifying operator growth in time in an appropriately defined basis, while another …