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We examine the shot noise spectrum properties of coherent resonant tunnelingin coupled quantum dots in both series and parallel arrangements by means ofquantum rate equations and MacDonald's formula. Our results show that, for aseries-CQD with a relatively high dot-dot hopping $\Omega$,$\Omega/\Gamma\gtrsim 1$ ($\Gamma$ denotes the dot-lead tunnel-couplingstrength), the noise spectrum exhibits a dip at the Rabi frequency, $2\Omega$,in the case of noninteracting electrons, but the dip is supplanted by a peak inthe case of strong Coulomb repulsion; furthermore, it becomes a dip again for acompletely symmetric parallel-CQD by tuning enclosed magnetic-flux.

Finite-frequency current (shot) noise in coherent resonant tunneling through a coupled-quantum-dot interferometer