Ground state cooling of magnomechanical resonator in <i>PT</i>-symmetric cavity magnomechanical system at room temperature

doi:10.1007/s11467-020-0996-y

Front. Phys.

2020, Vol. 15

Issue (5) : 52504 https://doi.org/10.1007/s11467-020-0996-y

RESEARCH ARTICLE

Ground state cooling of magnomechanical resonator in PT-symmetric cavity magnomechanical system at room temperature

Zhi-Xin Yang¹, Liang Wang¹, Yu-Mu Liu², Dong-Yang Wang³, Cheng-Hua Bai³, Shou Zhang¹(

), Hong-Fu Wang¹(

)

¹. Department of Physics, College of Science, Yanbian University, Yanji 133002, China
². Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130024, China
³. School of Physics, Harbin Institute of Technology, Harbin 150001, China

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Abstract

We propose to realize the ground state cooling of magnomechanical resonator in a parity–time (PT)-symmetric cavity magnomechanical system composed of a loss ferromagnetic sphere and a gain microwave cavity. In the scheme, the magnomechanical resonator can be cooled close to its ground state via the magnomechanical interaction, and it is found that the cooling effect in PT-symmetric system is much higher than that in non-PT-symmetric system. Resorting to the magnetic force noise spectrum, we investigate the final mean phonon number with experimentally feasible parameters and find surprisingly that the ground state cooling of magnomechanical resonator can be directly achieved at room temperature. Furthermore, we also illustrate that the ground state cooling can be flexibly controlled via the external magnetic field.

Keywords ground state cooling magnomechanical resonator PT-symmetry

Corresponding Author(s): Shou Zhang,Hong-Fu Wang

Just Accepted Date: 08 September 2020 Issue Date: 10 October 2020

Cite this article:

Zhi-Xin Yang,Liang Wang,Yu-Mu Liu, et al. Ground state cooling of magnomechanical resonator in PT-symmetric cavity magnomechanical system at room temperature[J]. Front. Phys. , 2020, 15(5): 52504.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-020-0996-y
https://academic.hep.com.cn/fop/EN/Y2020/V15/I5/52504

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