  In two-dimensional (2D) electron systems, an off-resonant high-frequency
circularly polarized electromagnetic field can induce the quasi-stationary
bound electron states of repulsive scatterers. As a consequence, the resonant
scattering of conduction electrons through the quasi-stationary states and the
capture of conduction electrons by the states appear. The present theory
describes the transport properties of 2D electron gas irradiated by a
circularly polarized light, which are modified by these processes.
Particularly, it is demonstrated that irradiation of 2D electron systems by the
off-resonant field results in the quantum correction to conductivity of
resonant kind.
