We investigate the correlations of initially separable probability distributions in a globally pure bipartite system with two degrees of freedom for classical and quantum systems. A classical version of the quantum linear mutual information is introduced and the two quantities are compared for a...

Recently obtained results on the quantum “grid” of mean values of observables in the energy representation for the maser model is here compared with the classical results calculated via the microcanonical mean values using the classical hamiltonian. Our main result is the evidence that such...

A double sine-Gordon Hamiltonian is studied as a function of a parameter that changes the nature of the minima of the potential. The behaviour of the system in one of the several metastable vacua is particularly analyzed when this state is about to become unstable. The analysis is carried out in...

We study the behavior of quantum invariants in the integrable maser model, and in the nonintegrable case, where the constants of motion are destroyed by turning on an interaction which is known to be classically chaos generating. By plotting the mean values of selected observables for each...