2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/89421The second order quantum decoherence (SOQDC)is proposed as a novel description for the loss of quantum coherence only reflected by second order quantum correlations. By calculating the two-time correlation function, the phenomenon of SOQDC is studied in details for a simple model, a two boson system interacting with a reservoir composed of one or many bosons. The second order quantum decoherence effects can be observed in the sketched cavity QED experiment.4 pages, 3 figures, revtex, corrected some typosQuantum Physicstext