Photon-Assisted Transport Through Ultrasmall Quantum Dots: Influence of Intradot Transitions
Preprint
- 25 March 1997
Abstract
We study transport through one or two ultrasmall quantum dots with discrete energy levels to which a time-dependent field is applied (e.g., microwaves). The AC field causes photon-assisted tunneling and also transitions between discrete energy levels of the dot. We treat the problem by introducing a generalization of the rotating-wave approximation to arbitrarily many levels. We calculate the dc-current through one dot and find satisfactory agreement with recent experiments by Oosterkamp et al. . In addition, we propose a novel electron pump consisting of two serially coupled single-level quantum dots with a time-dependent interdot barrier.Keywords
All Related Versions
- Version 1, 1997-03-25, ArXiv
- Published version: Physical Review B, 56 (8), 4730.
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