Optics and Spectroscopy
Kinetic equations for the density matrix of two-level particles in a strong field
Е. А. Титов
Abstract
On the basis of the Green’s function method for nonequilibrium systems, the kinetic equation for two-level particles in a strong field is derived. In the binary approximation, all diagrams are expressed in terms of the reducible vertex part, whose calculation is reduced to the problem of two-channel scattering and finding the corresponding scattering amplitudes.