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Updated: Apr 17, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Relaxation of isolated quantum systems beyond chaos
Ignacio García-Mata1, Augusto J Roncaglia2, Diego A Wisniacki2
1Instituto de Investigaciones Físicas de Mar del Plata (IFIMAR, CONICET), Universidad Nacional de Mar del Plata, Mar del Plata, Argentina and Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Argentina.
Abstract:
In classical statistical mechanics there is a clear correlation between relaxation to equilibrium and chaos. In contrast, for isolated quantum systems this relation is--to say the least--fuzzy. In this work we try to unveil the intricate relation between the relaxation process and the transition from integrability to chaos. We study the approach to equilibrium in two different many-body quantum systems that can be parametrically tuned from regular to chaotic. We show that a universal relation between relaxation and delocalization of the initial state in the perturbed basis can be established regardless of the chaotic nature of system.
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