Transmission phase of a quantum dot: Testing the role of population switching

Details Transmission phase of a quantum dot: Testing the role of population switching Transmission phase of a quantum dot: Testing the role of population switching

2008-09-24

arxiv.org/abs/0809.4133v1

Phys. Rev. B 79, 125307 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.79.125307

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.

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