Simultaneous cooling of the internal and external degrees of freedom of a levitated micromagnet in a cavity magnomechanical system
Cooling the internal and external degrees of freedom (DOFs) of a massive mechanical system close to the quantum ground state is a prerequisite for the quantum manipulation of macroscopic mechanical devices. In this paper, we propose a approach to simultaneously cool both the internal and external DO...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-08-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/8pzl-6c5l |
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| author | Lei Chen Yang Liu Liang Bin Sai-Yun Ye Zhi-Rong Zhong |
| author_facet | Lei Chen Yang Liu Liang Bin Sai-Yun Ye Zhi-Rong Zhong |
| author_sort | Lei Chen |
| collection | DOAJ |
| description | Cooling the internal and external degrees of freedom (DOFs) of a massive mechanical system close to the quantum ground state is a prerequisite for the quantum manipulation of macroscopic mechanical devices. In this paper, we propose a approach to simultaneously cool both the internal and external DOFs (phonon and center-of-mass modes) of a levitated micromagnet within a cavity magnomechanical (CMM) system. By driving the cavity mode and magnon mode on their respective red sidebands with microwave fields, the proposed scheme effectively suppresses Stokes scattering and significantly enhances the net cooling rate. Moreover, differing from conventional CMM systems, our proposal can achieve simultaneous cooling of the internal and external DOFs even in the unresolved-sideband regime. Our numerical simulations demonstrate the robustness and effectiveness of the scheme by analyzing average occupancies of the internal and external DOFs, as well as identifying the optimal cooling conditions. The proposed scheme establishes a foundation for probing and manipulating the internal DOFs by controlling the external DOFs, which may open additional possibilities for studying nonequilibrium quantum mesoscopic physics. |
| format | Article |
| id | doaj-art-8c0468bcacc54e358a82ee10ee7fb977 |
| institution | DOAJ |
| issn | 2643-1564 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-8c0468bcacc54e358a82ee10ee7fb9772025-08-20T03:05:03ZengAmerican Physical SocietyPhysical Review Research2643-15642025-08-017303315710.1103/8pzl-6c5lSimultaneous cooling of the internal and external degrees of freedom of a levitated micromagnet in a cavity magnomechanical systemLei ChenYang LiuLiang BinSai-Yun YeZhi-Rong ZhongCooling the internal and external degrees of freedom (DOFs) of a massive mechanical system close to the quantum ground state is a prerequisite for the quantum manipulation of macroscopic mechanical devices. In this paper, we propose a approach to simultaneously cool both the internal and external DOFs (phonon and center-of-mass modes) of a levitated micromagnet within a cavity magnomechanical (CMM) system. By driving the cavity mode and magnon mode on their respective red sidebands with microwave fields, the proposed scheme effectively suppresses Stokes scattering and significantly enhances the net cooling rate. Moreover, differing from conventional CMM systems, our proposal can achieve simultaneous cooling of the internal and external DOFs even in the unresolved-sideband regime. Our numerical simulations demonstrate the robustness and effectiveness of the scheme by analyzing average occupancies of the internal and external DOFs, as well as identifying the optimal cooling conditions. The proposed scheme establishes a foundation for probing and manipulating the internal DOFs by controlling the external DOFs, which may open additional possibilities for studying nonequilibrium quantum mesoscopic physics.http://doi.org/10.1103/8pzl-6c5l |
| spellingShingle | Lei Chen Yang Liu Liang Bin Sai-Yun Ye Zhi-Rong Zhong Simultaneous cooling of the internal and external degrees of freedom of a levitated micromagnet in a cavity magnomechanical system Physical Review Research |
| title | Simultaneous cooling of the internal and external degrees of freedom of a levitated micromagnet in a cavity magnomechanical system |
| title_full | Simultaneous cooling of the internal and external degrees of freedom of a levitated micromagnet in a cavity magnomechanical system |
| title_fullStr | Simultaneous cooling of the internal and external degrees of freedom of a levitated micromagnet in a cavity magnomechanical system |
| title_full_unstemmed | Simultaneous cooling of the internal and external degrees of freedom of a levitated micromagnet in a cavity magnomechanical system |
| title_short | Simultaneous cooling of the internal and external degrees of freedom of a levitated micromagnet in a cavity magnomechanical system |
| title_sort | simultaneous cooling of the internal and external degrees of freedom of a levitated micromagnet in a cavity magnomechanical system |
| url | http://doi.org/10.1103/8pzl-6c5l |
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