Quantum chaotic fluctuation-dissipation theorem: Effective Brownian motion in closed quantum systems
Authors: Nation, Charlie; Porras, Diego Contribution: Article Journal: PHYSICAL REVIEW E Publication date: 2019/05/30 DOI: 10.1103/PhysRevE.99.052139 Abstract: We analytically describe the decay to equilibrium of generic observables of a nonintegrable system after a perturbation in the form of a random matrix. We further obtain an analytic form for the time-averaged fluctuations of an observable in terms [...]