Cavity Cooling of a Levitated Nanosphere by Coherent Scattering
Name
PhysRevLett.122.123602.pdf
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1.11 MB
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Author(s)
Delić, Uroš
Reisenbauer, Manuel
Grass, David
Kiesel, Nikolai
Vuletic, Vladan
Aspelmeyer, Markus
Date Issued
March 2019
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Delić, Uroš et al. "Cavity Cooling of a Levitated Nanosphere by Coherent Scattering." Physical Review Letters 122, 12 (March 2019): 123602 © 2019 American Physical Society
Version
Final published version
Abstract
We report three-dimensional (3D) cooling of a levitated nanoparticle inside an optical cavity. The cooling mechanism is provided by cavity-enhanced coherent scattering off an optical tweezer. The observed 3D dynamics and cooling rates are as theoretically expected from the presence of both linear and quadratic terms in the interaction between the particle motion and the cavity field. By achieving nanometer-level control over the particle location we optimize the position-dependent coupling and demonstrate axial cooling by two orders of magnitude at background pressures of 6×10⁻² mbar. We also estimate a significant (>40 dB) suppression of laser phase noise heating, which is a specific feature of the coherent scattering scheme. The observed performance implies that quantum ground state cavity cooling of levitated nanoparticles can be achieved for background pressures below 1×10⁻⁷ mbar.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.122.123602
