title: Time-dependent electron transport through a strongly correlated quantum dot: multiple-probe open-boundary conditions approach.
abstract: We  present a time-dependent study of electron transport through a strongly correlated quantum dot, which combines adiabatic lattice density functional theory in the Bethe ansatz local-density approximation (BALDA) to the Hubbard model, with the multiple-probe battery method for open-boundary simulations in the time domain. In agreement with the recently proposed dynamical picture of Coulomb blockade, a characteristic driven regime, defined by regular current oscillations, is demonstrated for a certain range of bias voltages. We further investigate the effects of systematically improving the approximation for the electron-electron interaction at the dot site (going from non-interacting, through Hartree-only to adiabatic BALDA) on the transmission spectrum and the I-V characteristics. In particular, a negative differential conductance is obtained at large bias voltages and large Coulomb interaction strengths. This is attributed to the combined effect of the electron-electron interaction at the dot and the finite bandwidth of the electrodes.
authors: School of Physics and CRANN, Trinity College Dublin, Dublin 2, Ireland. pertsova@tcd.ie
authors: A
authors: A
authors: Pertsova
authors: M
authors: M
authors: Stamenova
authors: S
authors: S
authors: Sanvito