title: Dynamics of relaxation and fluctuations of the equilibrium state in an incompletely chaotic system.
abstract: An incompletely chaotic system, with a perturbation of the integrable part that does not obey selection rules, relaxes to an equilibrium state that lies between the initial state and thermal equilibrium. We analyze here a system of two atoms in a circular transversally harmonic waveguide. The dynamics of expectation values of generic observables and their fluctuations in the long-time limit are studied for this model. The relaxation demonstrates a nonexponential behavior and slows down as the initial-state energy increases. The fluctuation amplitude has a tendency to decrease with an increase of the initial state width.
authors.affiliation: School of Chemistry, Tel Aviv University, 69978 Tel Aviv, Israel.
authors.forename: Vladimir A
authors.initials: VA
authors.lastname: Yurovsky
authors.forename: Abraham
authors.initials: A
authors.lastname: Ben-Reuven
authors.forename: Maxim
authors.initials: M
authors.lastname: Olshanii