Nonreciprocal Thermodynamic Devices Via Barnett Effect in a Cavity Magnomechanical System

Résumé fourni par la source

ABSTRACT We propose a scheme to achieve a nonreciprocal thermodynamic device by utilizing the Barnett effect in a cavity magnomechanical system. By adjusting the effective magnon detuning, we achieve the conversion of the two polariton branches characteristics between magnonlike and phononlike, providing a quantum control foundation for the thermodynamic processes. Depending on the selection of different polariton branches, the system can operate as either a quantum heat engine or thermal accelerator. Under red detuning, changing the direction of the static magnetic field to render the Barnett shift positive can enhance the work output, efficiency, and coefficient of performance (COP). Conversely, it will suppress them, thereby realizing a nonreciprocal thermodynamic device. Under weak effective magnon–phonon coupling conditions, there exists an optimal region suitable for the operation of thermodynamic devices. Our scheme provides a path for the nonreciprocal regulation of thermodynamic devices, and this research holds substantial application prospects for designing a high‐performance thermodynamic device in magnetic devices.

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