Coulomb blockade in quantum dots with overlapping resonances

Details Coulomb blockade in quantum dots with overlapping resonances Coulomb blockade in quantum dots with overlapping resonances

1999-11-13

arxiv.org/abs/cond-mat/9911205v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, uses crckapb.sty, 4 figures. Talk at the NATO ASI "Quantum Mesoscopic Phenomena and Mesoscopic devices in Microelect

Scientific paper

Coulomb blockade (CB) in a quantum dot (QD) with one anomalously broad level is considered. In this case many consecutive pronounced CB peaks correspond to occupation of one and the same broad level. Between the peaks the electron jumps from this level to one of the narrow levels and the transmission through the dot at the next resonance essentially repeats that at the previous one. This offers a natural explanation to the recently observed behavior of the transmission phase in an interferometer with a QD. Single particle resonances of very different width are natural if the dot is not fully chaotic. This idea is illustrated by the numerical simulations for a non-integrable QD whose classical dynamics is intermediate between integrable and chaotic. Possible manifestations for the Kondo experiments in the QD are discussed.

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