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We theoretically investigated the dephasing in an Aharonov-Bohminterferometer containing a lateral double quantum dot induced by coupling witha quantum dot charge sensor. We employed the interpolative 2nd-orderperturbation theory to include the charge sensing Coulomb interaction. It isshown that the visibility of the Aharonov-Bohm oscillation of the linearconductance decreases monotonically as the sensing Coulomb interactionincreases. In particular, for a weak sensing interaction regime, the visibilitydecreases parabolically, and it behaves linearly for a strong sensinginteraction regime.

Dephasing in an Aharonov-Bohm interferometer containing a lateral double quantum dot induced by coupling with a quantum dot charge sensor