FLUCTUATIONS IN INELASTIC TUNNELING OF ELECTRONS THROUGH SERIALLY COUPLED DOUBLE QUANTUM DOTS

Abstract

We investigate the inelastic transport properties of quantum dots connected to two leads, based on the combination of a recently developed nonperturbative technique and full counting statistics involving an approximate mapping of a many-body electron–phonon system onto a multichannel scattering system. The full counting statistics is adopted in the calculations of the inelastic transport processes of electrons where the electron–phonon interactions, which are the main source of the inelasticity, are taken into account. For serially coupled double quantum dots, we find that (i) both the current and the noise are suppressed when electron–phonon interaction switches on, and (ii) skewness becomes negative in a certain parameter regime, which is absent in the case without electron–phonon interactions.