Interaction of 3-level atom with radiation
Abstract
The interaction of 3-level system with a quantum field in a non-equilibrium state is considered. We describe a class of states of the quantum field for wich a stationary state drives the system to inverse populated state. We find that the quotient of the population of the energy levels in the simplest case is described by the double Einstein formula which involves products of two Einstein emission/absorption relations. Emission and absorption of radiation by 3-level atom in non-equlibrium stationary state is described.
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