Stable magnetic levitation of soft ferromagnets for macroscopic quantum mechanics

Fuwa, Maria

doi:10.1103/physreva.108.023523

Phys. Rev. A

2023

DOI: 10.1103/physreva.108.023523

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Stable magnetic levitation of soft ferromagnets for macroscopic quantum mechanics

Maria Fuwa

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Cited by 3 publications

References 62 publications

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Ferromagnetic levitation and harmonic trapping of a milligram-scale yttrium iron garnet sphere

Fuwa,

Sakagami,

Tamegai

2023

Phys. Rev. A

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Ferromagnetic levitation and harmonic trapping of a milligram-scale yttrium iron garnet sphere

Fuwa,

Sakagami,

Tamegai

2023

Phys. Rev. A

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Magnon cat states induced by photon parametric coupling

Liu,

Wu,

2024

Phys. Rev. Applied

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Linear cooling of a levitated micromagnetic cylinder by vibration

Timberlake,

Simcox,

Ulbricht

2024

Phys. Rev. Research

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We report feedback cooling of translational and librational degrees of freedom of a levitated m icromagnet cylinder, utilizing a piezoelectric actuator to apply linear feedback to high-Q mechanical modes. The normal modes are measured with a superconducting pick-up coil coupled to a dc SQUID, and phase information is fed back to the piezoelectric actuator to feedback cool a center-of-mass mode to ∼7K, and a librational mode to 830±200mK. Q-factors of 1.0×107 are evaluated for the center-of-mass mode. We find that it is plausible to achieve ground state cooling of the center-of-mass mode by introducing vibration isolation, optimizing the geometry of the pick-up coil to focus on the specific mode of interest and utilizing a state-of-the-art SQUID for detection. Published by the American Physical Society 2024

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Stable magnetic levitation of soft ferromagnets for macroscopic quantum mechanics

Cited by 3 publications

References 62 publications

Ferromagnetic levitation and harmonic trapping of a milligram-scale yttrium iron garnet sphere

Ferromagnetic levitation and harmonic trapping of a milligram-scale yttrium iron garnet sphere

Magnon cat states induced by photon parametric coupling

Linear cooling of a levitated micromagnetic cylinder by vibration

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