DYNAMICAL ASPECTS OF TSALLIS ENTROPY

The description of the temporal evolution of some physical systems is tackled from an information theory view-point in which Tsallis' entrop y is extremalized with the constraints posed by the knowledge of the g eneralized expectation values of a selected set of observables. The co ncomitant Tsallis density operator is shown to be a particular solutio n of von Neumann's equation and Tsallis' entropy is seen to provide on e with a constant of the motion. The pertinent ideas are illustrated w ith reference to the Larmor precession.