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Magnon squeezing enhanced ground-state cooling in cavity magnomechanics
M Asjad1, Jie Li2, Shi-Yao Zhu2
1Department of Applied Mathematics and Sciences, Khalifa University, Abu Dhabi 127788, United Arab Emirates.
Fundamental Research
|December 11, 2024
Summary
Magnon squeezing enhances ground-state cooling in cavity magnomechanics by suppressing scattering. This method is effective even in unresolved-sideband regimes, offering a new path for macroscopic quantum state research.
Area of Science:
- Quantum physics
- Condensed matter physics
- Cavity magnomechanics
Background:
- Cavity magnomechanics explores macroscopic quantum phenomena using magnetostriction-induced vibrations.
- Achieving ground states in these systems is key to studying quantum behavior.
Purpose of the Study:
- Investigate ground-state cooling of mechanical modes in cavity magnomechanical systems.
- Determine the role of magnon squeezing in enhancing cooling efficiency.
Main Methods:
- Utilized magnon self-Kerr nonlinearity to achieve magnon squeezing.
- Studied the effect of magnon squeezing on magnomechanical Stokes scattering.
- Analyzed cooling efficiency in both resolved and unresolved-sideband regimes.
Main Results:
- Magnon squeezing significantly suppresses magnomechanical Stokes scattering.
- Magnon squeezing enables efficient ground-state cooling in the unresolved-sideband regime.
- Microwave cavity coupling adversely affects mechanical cooling.
Conclusions:
- Magnon squeezing is a powerful tool for ground-state cooling in cavity magnomechanics.
- Two-mode magnomechanical systems without microwave cavities are preferred for mechanical cooling.
- This research paves the way for realizing genuine macroscopic quantum states.
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