Transmission phase of a quantum dot: Testing the role of population switching
arXiv:0809.4133 · doi:10.1103/PhysRevB.79.125307
Abstract
We propose a controlled experiment to clarify the physical mechanism causing phase lapses of the amplitude for electron transmission through nanoscale devices. Such lapses are generically observed in valleys between adjacent Coulomb--blockade peaks. The experiment involves two quantum dots embedded in the same arm of an Aharonov--Bohm interferometer. It offers a decisive test of "population switching", one of the leading contenders for an explanation of the phenomenon.
4 pages, 4 figures
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