Charging effects in ultrasmall quantum dots in the presence of time-varing fields
- 14 February 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 72 (7), 1076-1079
- https://doi.org/10.1103/physrevlett.72.1076
Abstract
The influence of charging effects on time-dependent transport in small semicondutor quantum dots with arbitrary level spectra is studied. Starting from an explicit time-dependent tunneling Hamiltonian, a non-Markovian master equation is derived which is also valid in the nonlinear response regime. The many-body nonequilibrium distribution functions of the dot are calculated and the I-V characteristic of the structure including the displacement currents is obtained. New resonant features show up in the Coulomb oscillations and in the Coulomb staircase, and a new possibility to realize electronic pumps is described.Keywords
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