Fano-Kondo shot noise in a quantum dot embedded interferometer irradiated with microwave fields

摘要

The shot noise of a quantum dot embedded Aharonov-Bohm (AB) interferometer under the perturbation of microwave fields is investigated by employing equation of motion method. The frequency-dependent shot noise formula is derived, and the photon-assisted Fano-Kondo resonance, the suppression of Kondo peak are presented with increasing the direct tunneling strength. The interference and correlation of electrons induce the asymmetric resonant peak-valley behavior of shot noise. The enhancement and suppression of shot noise are resulting from the competition of incoherent correlation and destructive interference effects, and super-Poissonian and sub-Poissonian noise can be adjusted by the applied photon irradiation, gate bias, and direct tunneling strength. The periodic oscillation versus AB phase with period 27 pi appears to show plateaus and flat valleys. (C) 2014 Elsevier B.V. All rights reserved.