  We study the performance of an endoreversible magnetic Otto cycle with a
working substance composed of a single quantum dot described using the
well-known Fock-Darwin model. We find that tuning the intensity of the
parabolic trap (geometrical confinement) impacts the proposed cycle's
performance, quantified by the power, work, efficiency, and parameter region
where the cycle operates as an engine. We demonstrate that a parameter region
exists where the efficiency at maximum output power exceeds the Curzon-Ahlborn
efficiency, the efficiency at maximum power achieved by a classical working
substance.

Statistical Mechanics;Quantum Physics