Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-05-12
Journal of Physics A 43, 354020 (2010)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
13 pages, 5 figures, to be published in Journal of Physics A
Scientific paper
We theoretically investigated the dephasing in an Aharonov-Bohm interferometer containing a lateral double quantum dot induced by coupling with a quantum dot charge sensor. We employed the interpolative 2nd-order perturbation theory to include the charge sensing Coulomb interaction. It is shown that the visibility of the Aharonov-Bohm oscillation of the linear conductance decreases monotonically as the sensing Coulomb interaction increases. In particular, for a weak sensing interaction regime, the visibility decreases parabolically, and it behaves linearly for a strong sensing interaction regime.
Kubo Takayuki
Tarucha Seigo
Tokura Yasuhiro
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