Performance of a Stirling quantum heat engine using nonextensive thermodynamics: Magnetic field, Dzyaloshinskii-Moriya and KSEA interactions

A quantum heat engine (QHE) is an interesting subject in physics and engineering. The Stirling QHE is a groundbreaking advancement in the field of quantum machines. In this work, the performance of the Stirling QHE is considered by treating its working substance as a two-qubit Heisenberg model, taking into account the Kaplan–Shekhtman–Entin–Wohlman–Aharony (KSEA) interaction, Dzyaloshinskii–Moriya interaction (DMI) and a magnetic field within the framework of the nonextensive formalism. The novelty of the work is to use the nonextensive formalism (Tsallis formalism) to examine the quantum Stirling engine. We study the influence of the nonextensive Tsallis parameter ([Formula: see text], KSEA parameter, DM parameter and magnetic field on various aspects of the Stirling heat engine, including entropy, absorbed heat, released heat, work done and efficiency. The minimum values of entropy (maximum order of the system) depend strongly on both parameters, KSEA and DM parameters. The best value for the efficiency of this QHE can be obtained by setting sufficient values for the system parameters such as the nonextensive parameter, KSEA parameter, DM parameter and magnetic field. Here, we obtained a maximum value of 0.20 for the efficiency of the QHD at [Formula: see text].