2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/113245Thermodynamical equilibrium is considered as an effect of quantum entangling of the vacuum state of a system. An explicit mathematical model of multi- particle entangled pure quantum states is developed and analyzed. In the framework, the process of measurement results in probability distributions that exactly correspond to the heat equilibrium of a system in a thermostat.11 pages, 2 figure, a report for the XI International Conference on Quantum Optics (ICQO-2006), May 26-31, 2006, Minsk, BelarusQuantum PhysicsStatistical MechanicsData Analysis, Statistics and Probabilitytext