Performance of a Bosonic Quantum Otto Refrigerator with Partial Thermalization
Shofiyah, Trengginas Eka Putra Sutantyo, Zulfi Abdullah

Theoretical Physics Laboratory, Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Limau Manis, Padang, 25163, Indonesia

Abstract

Quantum refrigerators (QRs) have emerged as an essential study in the research of microscopic thermodynamic systems. In this study, we examine the performance of a quantum Otto refrigerator using an ideal non-interacting bosonic gas trapped in a cubic potential. The system is investigated in finite-time operation with a focus on the effects of partial thermalization during isochoric processes. The novelty of the research is to achieve a higher coefficient of performance (COP) at maximum power, namely CMP, by utilizing partial thermalization. Using the grand canonical ensemble formalism, thermodynamic properties are derived analytically to obtain the COP and the power of the refrigerator. Numerical calculations are performed to evaluate the CMP. This study aims to provide a more realistic characterization of the performance of the quantum refrigerator system at the microscopic scale, especially on the role of partial thermalization during finite-time operation.

Keywords: Quantum Refrigerator, Otto Cycle, Cubic Potential, Coefficient of Performance (COP), Partial Thermalization

Topic: Theory, Nuclear, and Particle Physics