Mesoscopic Fano effect in a quantum dot embedded in an Aharonov-Bohm ring
Kensuke Kobayashi, Hisashi Aikawa, Shingo Katsumoto, and Yasuhiro Iye
Physical Review B 68 235304 (2003)
Modify
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 line shape, we need to introduce a complex q to describe
the variation of the line shape 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.