Mesoscopic Fano Effect in a Quantum Dot Embedded in an Aharonov-Bohm Ring

Abstract

The Fano effect, which occurs through the quantum-mechanical cooperation between resonance and interference, can be observed in electron transport through a hybrid system of a quantum dot and an Aharonov-Bohm ring. While a clear correlation appears between the height of the Coulomb peak and the real asymmetric parameter $q$ for the corresponding Fano lineshape, we need to introduce a complex $q$ to describe the variation of the lineshape by the magnetic and electrostatic fields. The present analysis demonstrates that the Fano effect with complex asymmetric parameters provides a good probe to detect a quantum-mechanical phase of traversing electrons.

REVTEX, 9 pages including 8 figures

References in corpus (6)

• Fano resonance in crossed carbon nanotubes
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• Probe-configuration dependent dephasing in a mesoscopic interferometer
• Effects of signs in tunneling matrix elements on transmission zeros and phase
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