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Transmission phase lapses through a quantum dot in a strong magnetic field

By Yehuda Dinaii, Yuval Gefen and Bernd Rosenow

Abstract

The phase of the transmission amplitude through a mesoscopic system contains information about the system's quantum mechanical state and excitations thereof. In the absence of an external magnetic field, abrupt phase lapses occur between transmission resonances of quantum dots and can be related to the signs of tunneling matrix elements. They are smeared at finite temperatures. By contrast, we show here that in the presence of a strong magnetic field, phase lapses represent a genuine interaction effect and may occur also on resonance. For some realistic parameter range these phase lapses are robust against finite temperature broadening.Comment: 8 pages including supplemental material; 4 figures; several references adde

Topics: Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons
Year: 2013
DOI identifier: 10.1103/PhysRevLett.112.246801
OAI identifier: oai:arXiv.org:1308.1285
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