2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/204946We consider two-particle correlations, which appear in relativistic nuclear collisions due to the quantum statistics of identical particles, in the frame of two formalisms: wave-function and current. The first one is based on solution of the Cauchy problem, whereas the second one is a so-called current parametrization of the source of secondary particles. We argue that these two parameterizations of the source coincide when the wave function at freeze-out times is put in a specific correspondence with a current. Then, the single-particle Wigner density evaluated in both approaches gives the same result.27 pages, 3 figures; Extended version of the talk given at the International Workshop on Relativistic Nuclear Physics (WRNP 2007), June 2007, Kiev, Ukraine; typos addedHigh Energy Physics - Phenomenologytext