Rostock 2019 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 20: Quantum Information (Solid State Systems)
Q 20.2: Talk
Monday, March 11, 2019, 16:45–17:00, S HS 002 Chemie
Cavity-Based 3D Cooling of a Levitated Nanoparticle via Coherent Scattering — Dominik Windey1, Carlos Gonzalez-Ballestero2,3, Patrick Maurer2,3, Lukas Novotny1, Oriol Romero-Isart2,3, and •René Reimann1 — 1Photonics Laboratory, ETH Zürich, 8093 Zürich, Switzerland — 2Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria — 3Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria
We experimentally realize [1] cavity cooling of all three translational degrees of motion of a levitated nanoparticle in vacuum. The particle is trapped by a cavity-independent optical tweezer and coherently scatters tweezer light into the blue detuned cavity mode. For vacuum pressures around 10−5 mbar, minimal temperatures along the cavity axis in the mK regime are observed. Simultaneously, the center-of-mass (COM) motion along the other two spatial directions is cooled to minimal temperatures of a few hundred mK. Measuring temperatures and damping rates as the pressure is varied, we find that the cooling efficiencies depend on the particle position within the intracavity standing wave. This data and the behaviour of the COM temperatures as functions of cavity detuning and tweezer power are consistent with a theoretical analysis [2] of the experiment. We discuss experimental limits and opportunities of our approach.
D. Windey, et al., arXiv:1812.09176 (2018)
C. Gonzalez-Ballestero, et al., arXiv:1902.01282 (2019)