Abstract
Electronic transport through a triple quantum dot system, with only a single dot coupled directly to external leads, is considered theoretically. The model includes Coulomb correlations in the central dot, while such correlations in the two side-coupled dots are omitted. The infinite-$U$ mean-field slave-boson approach is used to obtain basic transport characteristics in the Kondo regime. When tuning the position of the side-coupled dots' levels, transition from subradiant to superradiant-like mode (and vice versa) has been found in the spectral function, in analogy to the Dicke effect in atomic physics. Bias dependence of the differential conductance and zero-frequency shot noise is also analyzed.
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