2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/25154In this study we obtained analytically relaxation function in terms of rotational correlation functions based on Brownian motion for complex disordered systems in a stochastic framework. We found out that rotational relaxation function has a fractional form for complex disordered systems, which indicates relaxation has non-exponential character obeys to Kohlrausch-William-Watts law, following the Mittag-Leffler decay.Revtex4, 9 pages. Paper was revised. References addedStatistical MechanicsMathematical Physicstext