Cavity Cooling of a Levitated Nanosphere by Coherent Scattering

Author(s)
Uros Delic, Manuel Reisenbauer, David Grass, Nikolai Kiesel, Vladan Vuletic, Markus Aspelmeyer
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 x 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 x 10(-7) mbar.

Organisation(s)
Quantum Optics, Quantum Nanophysics and Quantum Information
External organisation(s)
Österreichische Akademie der Wissenschaften (ÖAW), Massachusetts Institute of Technology
Journal
Physical Review Letters
Volume
122
No. of pages
6
ISSN
0031-9007
DOI
https://doi.org/10.1103/PhysRevLett.122.123602
Publication date
03-2019
Peer reviewed
Yes
Austrian Fields of Science 2012
103005 Atomic physics, 103021 Optics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/cavity-cooling-of-a-levitated-nanosphere-by-coherent-scattering(d5895104-ea6b-4ebf-a224-e890a77a293f).html