The Role of Bound States in Time-Dependent Quantum Transport

Details The Role of Bound States in Time-Dependent Quantum Transport The Role of Bound States in Time-Dependent Quantum Transport

2008-02-18

arxiv.org/abs/0802.2516v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 8 figures

Scientific paper

10.1007/s00339-008-4864-9

Charge transport through a nanoscale junction coupled to two macroscopic electrodes is investigated for the situation when bound states are present. We provide numerical evidence that bound states give rise to persistent, non-decaying current oscillations in the junction. We also show that the amplitude of these oscillations can exhibit a strong dependence on the history of the applied potential as well as on the initial equilibrium configuration. Our simulations allow for a quantitative investigation of several transient features. We also discuss the existence of different time-scales and address their microscopic origin.

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