Galetti, D.Ruzzi, M.2014-05-202014-05-202000-04-14Journal of Physics A-mathematical and General. Bristol: Iop Publishing Ltd, v. 33, n. 14, p. 2799-2816, 2000.0305-4470http://hdl.handle.net/11449/23628The discrete phase space approach to quantum mechanics of degrees of freedom without classical counterparts is applied to the many-fermions/quasi-spin Lipkin model. The Wi:ner function is written for some chosen states associated to discrete angle and angular momentum variables, and the rime evolution is numerically calculated using the discrete von Neumnnn-Liouville equation. Direct evidences in the lime evolution of the Wigner function are extracted that identify a tunnelling effect. A connection with a SU(2)-based semiclassical continuous approach to the Lipkin model is also presented.2799-2816engArtigo10.1088/0305-4470/33/14/313WOS:000087825600015Acesso restrito