No abstract

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

We study theoretically the transient electron transport in the multiple quantum dots (QDs) systems forced by the suddenly applied bias voltage. Depending on the quantum dots configuration and parameters describing the considered system different beat patterns of the resulting transient current are observed. We find out that the careful inspection of the transient current beat patterns can provide the information about the inter-dot hopping amplitudes, quantum dots energy levels and their occupancies before the abrupt change of the bias voltage is made.