  Thermal transport and quantum thermodynamics at the nanoscale is nowadays
garnering an increasing attention, in particular in the context of quantum
technologies. Experiments relevant for quantum technology are expected to be
performed in the non-linear regime. In this work, we build on previous results
derived in the linear response regime for the performance of an Aharonov-Bohm
(AB) interferometer operated as heat engine. In the non-linear regime, we
demonstrate the tunability, large efficiency and thermopower that this
mesoscopic quantum machine can achieve, confirming the exciting perspectives
that this AB ring offers for developing efficient thermal machines in the fully
quantum regime.
