A very recent work considers the role of interactions in the stirring of Bose condensed particles. Otherwise the rest of the literature concerns primarily electronic devices. Typically the pump is modeled as a quantum dot. The effect of electron–electron interactions within the dot region is taken into account in the Coulomb blockade regime or in the Kondo regime. In the former case charge transport is quantized even in the case of small backscattering. Deviation from the exact quantized value is related to dissipation. In the Kondo regime, as the temperature is lowered, the pumping effect is modified. There are also works that consider interactions over the whole system (including the leads) using the Luttinger liquid model.