InAs three quantum dots as working substance for quantum heat engines

Heat engines are considered a valuable resource for the modern society. The development of these systems leads to the production of heat engines with high efficiency despite their small size, called quantum heat engines. Among these, the quantum Otto cycle which is considered a fundamental thermodynamic cycle in classical heat engines, has also found applications in the realm of quantum heat engines. In this paper, we consider three InAs quantum dots as a working substance, which allows the engine to operate at very small scales, in the presence of an electric field, and the Förster mechanism, which describes the transfer of energy between quantum dots and thus affects the engine’s behavior. In this regard, we study the behavior of the work performed by the engine and the entanglement in the system as the Förster parameter is varied. We found a significant link between the engine’s work performance, the system’s entanglement, and the Förster interaction. At a critical Förster interaction value, which depends on the excitons frequencies, we observe a sharp inflection in work output. This transition coincides with the system reaching maximum entanglement after a separable state.