Cooling the Motion of a Silica Microsphere in a Magneto-Gravitational Trap in Ultra-High Vacuum

Abstract

Levitated optomechanical systems, and particularly particles trapped in vacuum, provide unique platforms for studying the mechanical behavior of objects well-isolated from their environment. Ultimately, such systems may enable the study of fundamental questions in quantum mechanics, gravity, and other weak forces. While the optical trapping of nanoparticles has emerged as the prototypical levitated optomechanical system, it is not without problems due to the heating from the high optical intensity required, particularly when combined with a high vacuum environment. Here we investigate a magneto-gravitational trap in ultra-high vacuum. In contrast to optical trapping, we create an entirely passive trap for diamagnetic particles by utilizing the magnetic field generated by permanent magnets and the gravitational interaction. We demonstrate cooling the center of mass motion of a trapped silica microsphere from ambient temperature to an effective temperature near or below one milliKelvin in two degrees of freedom by optical feedback damping.

arXiv comment11 pages, 7 figures

References in corpus (24)

• Laser cooling of a nanomechanical oscillator into its quantum ground state
• Sideband Cooling Micromechanical Motion to the Quantum Ground State
• Sub-Kelvin Parametric Feedback Cooling of a Laser-Trapped Nanoparticle
• Cavity optomechanics using an optically levitated nanosphere
• Millikelvin cooling of an optically trapped microsphere in vacuum
• Feedback cooling of a cantilever's fundamental mode below 5 mK
• Zeptonewton force sensing with nanospheres in an optical lattice
• Direct Measurement of Photon Recoil from a Levitated Nanoparticle
• Cavity cooling of an optically levitated nanoparticle
• Thermal nonlinearities in a nanomechanical oscillator
• Cavity cooling a single charged nanoparticle
• Short-range force detection using optically-cooled levitated microspheres
• Nanoscale temperature measurements using non-equilibrium Brownian dynamics of a levitated nanosphere
• Near-field interferometry of a free-falling nanoparticle from a point-like source
• Optically Levitating Dielectrics in the Quantum Regime: Theory and Protocols
• Search for Millicharged Particles Using Optically Levitated Microspheres
• Attonewton force detection using microspheres in a dual-beam optical trap in high vacuum
• Nonlinear dynamics and millikelvin cavity-cooling of levitated nanoparticles
• Optical levitation of 10 nanogram spheres with nano-$g$ acceleration sensitivity
• Search for Screened Interactions Associated with Dark Energy Below the 100 $\mu \mathrm{m}$ Length Scale
• Controlling the net charge on a nanoparticle optically levitated in vacuum
• Experimental Realisation of a Thermal Squeezed State of Levitated Optomechanics
• Testing Wavefunction Collapse Models using Parametric Heating of a Trapped Nanosphere
• Cooling the Motion of Diamond Nanocrystals in a Magneto-Gravitational Trap in High Vacuum

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