Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2005-01-26
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
34 pages, 12 figures
Scientific paper
10.1103/PhysRevB.72.125312
We have studied the electron transport through a quantum dot coupled to three leads in the presence of external microwave fields supplied to different parts of the considered mesoscopic system. Additionally, we introduced a possible nonresonant tunneling channels between leads. The quantum dot charge and currents were determined in terms of the appropriate evolution operator matrix elements and under the wide band limit the analytical formulas for time-averaged currents and differential conductance were obtained. We have also examined the response of the considered system on the rectangular-pulse modulation imposed on different quantum dot-leads barriers as well as the time-dependence of currents flowing in response to suddenly removed (or included) connection of a quantum dot with one of the leads.
Kwapinski Tomasz
Taranko E.
Taranko R.
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