2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/100126We introduce a quantum stochastic dynamics for heat conduction. A multi-level subsystem is coupled to reservoirs at different temperatures. Energy quanta are detected in the reservoirs allowing the study of steady state fluctuations of the entropy dissipation. Our main result states a symmetry in its large deviation rate function.41 pages, minor changes, published versionStatistical MechanicsOther Condensed Mattertext