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We consider the time-dependent electron transport through a quantum dotcoupled to two leads in the presence of the additional over-dot (bridge)tunneling channel. By using the evolution operator method together with thewide-band limit approximation we derived the analytical formulaes for thequantum dot charge and current flowing in the system. The influence of theexternal microwave field on the time-average quantum dot charge, the currentand the derivatives of the average current with respect to the gate andsource-drain voltages has been investigated for a wide range of parameters.Comment: 28 Pages, 11 Postscript figure

Influence of microwave fields on electron transport through a quantum dot in the presence of direct tunneling between leads