Phase measurement in the mesoscopic Aharonov-Bohm interferometer

A. Aharony, O. Entin-Wohlman, B. I. Halperin, Y. Imry

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90 Scopus citations

Abstract

Mesoscopic solid state Aharonov-Bohm interferometers have been used to measure the "intrinsic" phase, αQD, of the resonant quantum transmission amplitude through a quantum dot (QD). For a two-terminal "closed" interferometer, which conserves the electron current, Onsager's relations require that the measured phase shift β only "jumps" between 0 and π. Additional terminals open the interferometer but then β depends on the details of the opening. Using a theoretical model, we present quantitative criteria (which can be tested experimentally) for β to be equal to the desired αQD: the "lossy" channels near the QD should have both a small transmission and a small reflection.

Original languageEnglish
Article number115311
Pages (from-to)1153111-1153117
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number11
DOIs
StatePublished - 15 Sep 2002

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