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We study the relation between quantum pumping of charge and the workexchanged with the driving potentials in a strongly interacting ac-drivenquantum dot. We work in the large-interaction limit and in the adiabaticpumping regime, and we develop a treatment that combines the time-dependentslave-boson approximation with linear response in the rate of change of theac-potentials. We find that the time evolution of the system can be describedin terms of equilibrium solutions at every time. We analyze the effect of theelectronic interactions on the performance of the dot when operating as aquantum motor.  The main two effects of the interactions are a shift of the resonance and anenhancement of the efficiency with respect to a non-interacting dot. This isdue to the appearance of additional ac-parameters accounting for theinteractions that increase the pumping of particles while decreasing theconductance.

Enhanced performance of a quantum-dot-based nanomotor due to Coulomb interactions