Measuring the Transmission Phase of a Quantum Dot in a Closed Interferometer

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Abstract

The electron transmission through a closed Aharonov-Bohm mesoscopic solid-state interferometer, with a quantum dot (QD) on one of the paths, is calculated exactly for a simple model. Although the conductance is an even function of the magnetic flux (due to Onsager’s relations), in many cases one can use the measured conductance to extract both the amplitude and the phase of the “intrinsic” transmission amplitude tD=−i|tD|eiαD through the “bare” QD. We also propose to compare this indirect measurement with the (hitherto untested) direct relation sin2(αD)≡|tD|2/max(|tD|2).

Original languageEnglish
Number of pages4
JournalPhysical Review Letters
Volume90
Issue number15
DOIs
StatePublished - 16 Apr 2003
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

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