2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/97118We show in the framework of a tractable model that revivals and fractional revivals of wave packets afford clear signatures of the extent of departure from coherence and from Poisson statistics of the matter wave field in a Bose-Einstein condensate, or of a suitably chosen initial state of the radiation field propagating in a Kerr-like medium.10 pages, 4 figures, RevTeX4Quantum Physicstext