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An Aharonov-Bohm interferometer (ABI) carrying a quantum dot on one of itsarms is analyzed. It is found that the Kondo temperature of the device dependsstrongly on the magnetic flux penetrating the ring. As a result, mesoscopicfinite-size effects appear when the Kondo temperature of the dot on the ABI issignificantly smaller than the nominal one of the quantum dot (when not on theinterferometer), leading to plateaus in the finite-temperature conductance asfunction of the flux. The possibility to deduce the transmission phase shift ofthe quantum dot from measurements of the ABI conductance when it is opened(i.e., is connected to more than two leads) is examined, leading to theconclusion that finite-size effects, when significant, may hinder the detectionof the Kondo phase shiftComment: 13 pages, 10 figure

Flux-dependent Kondo temperature in an Aharonov-Bohm interferometer with an in-line quantum dot