Effects of virtual transitions in a high-frequency field on electron transport in triple-barrier structures

High-frequency conductivity has been calculated for triple-barrier nanostructures at resonance diagonal transitions. It is shown that the neglect of transitions to side nonresonance quasi-levels in a high-frequency electric field leads in some cases to an overestimation of the maximum conductivity by $60\%$, an increase in the line width of more than $40\%$, and an increase in the integral conductivity by a factor of almost 2.5. In these cases, the transmission coefficient calculated with allowance made for side satellites is approximately 0.6 rather than 1.