Electron pair current through the correlated quantum dot

摘要

We study .the charge current transmitted through the corre-lated quaotum dot characterized by a finite magnitude of the Coulomb interaction |U|.At low temperatures the correlationscan lead to fornadon of the spin (for U > 0) or charge(for < 0) Kondo states which qualitatively affect the trans-port properties, We explore the influence of charge Kondo ef-fect on the electron pair tunneling introducing the auxiliarytwo-channel model accounting for the fluctuations between theempty and doubly occupied states on QD.