Abstract
We describe microwave cavity-magnomechanical center-of-mass cooling of a levitated magnetic sphere. The standing magnetic component of the electromagnetic wave within a microwave cavity exerts a dynamical force on a magnonic crystalline sphere and dissipates the mechanical energy through scattering into the magnon mode. The coupling is established by the magnetic dipole interaction and enriched by the collective spin motion. We find that the final cooled phonon occupation achieved is an intensive property independent of the mass and size of the sphere, in contrast to standard optomechanical couplings. This is of particular importance for testing quantum mechanics with macroscopic objects.
Highlights
Introduction.—Cooling massive systems to their motional quantum ground state is a long-standing goal, for observing quantum signatures in the macroscopic world [1,2,3], and in performing ultrahigh-precision measurements [4,5] to explore physics beyond the standard model [6], search for dark matter [7], understand gravitational decoherence [8,9], and toward marking the classicalquantum boundary [10]
We find that the final cooled phonon occupation achieved is an intensive property independent of the mass and size of the sphere, in contrast to standard optomechanical couplings
This is of particular importance for testing quantum mechanics with macroscopic objects
Summary
Introduction.—Cooling massive systems to their motional quantum ground state is a long-standing goal, for observing quantum signatures in the macroscopic world [1,2,3], and in performing ultrahigh-precision measurements [4,5] to explore physics beyond the standard model [6], search for dark matter [7], understand gravitational decoherence [8,9], and toward marking the classicalquantum boundary [10]. We describe microwave cavity-magnomechanical center-of-mass cooling of a levitated magnetic sphere. We find that the final cooled phonon occupation achieved is an intensive property independent of the mass and size of the sphere, in contrast to standard optomechanical couplings.
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