Efficiency at maximum $\dot{\Omega}$ figure of merit of a spin half quantum heat engine in the presence of external magnetic field

• URL: http://arxiv.org/abs/2312.01710v1
• Date: Mon, 4 Dec 2023 07:52:53 GMT
• Title: Efficiency at maximum $\dot{\Omega}$ figure of merit of a spin half quantum heat engine in the presence of external magnetic field
• Authors: K. Nilavarasi and M. Ponmurugan
• Abstract summary: We study the efficiency at maximum $dotOmega$ figure of merit of the quantum heat engine of spin half particles as a working substance in the presence of external magnetic field. Our study indicates that the population of spin half particles plays a crucial role in quantum heat engine whose collective effect in the quantum regime can provide superior engine performance with higher efficiency.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: We consider a finite time quantum heat engine analogous to finite time classical Carnot heat engine with a working substance of spin half particles. We study the efficiency at maximum $\dot{\Omega}$ figure of merit of the quantum heat engine of spin half particles as a working substance in the presence of external magnetic field. The efficiency of this engine at maximum $\dot{\Omega}$ figure of merit shows anomalous behavior in certain region of particles population levels. Further, we find that the efficiency at maximum $\dot{\Omega}$ figure exceeds all the known bounds and even approaches the Carnot efficiency at finite time. Our study indicates that the population of spin half particles plays a crucial role in quantum heat engine whose collective effect in the quantum regime can provide superior engine performance with higher efficiency.

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