2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91931The master equation describing the completely positive time evolution of a uniformly accelerated two-level system in weak interaction with a scalar field in the Minkowski vacuum is derived and explicitly solved. It encodes the well known Unruh effect, leading to a purely thermal equilibrium state. This asymptotic state turns out to be entangled when the uniformly accelerating system is composed by two, independent two-level atoms.24 pages, plain-TeX, no figuresQuantum PhysicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theorytext