Entanglement of atoms by a resonance classical electromagnetic field

It is shown that the interaction of a system of two two-level atoms with a resonance classical electromagnetic field under conditions of collective relaxation gives rise to quantum correlations and controlled entanglement. Various models of the bath are examined, such as the unidirectional, one-dimensional, and three-dimensional models, as well as a squeezed bath. As a measure of the entanglement, the minimum negative eigenvalue of the Peres-Horodecki matrix is used.