Hannover 2020 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 2: Optomechanics
Q 2.1: Vortrag
Montag, 9. März 2020, 11:00–11:15, a310
Motional quantum ground state of a levitated nanoparticle from room temperature — •Uros Delic1,2, Manuel Reisenbauer1, Kahan Dare1,2, David Grass1, Vladan Vuletic3, Nikolai Kiesel1, and Markus Aspelmeyer1,2 — 1Vienna Center for Quantum Science and Technology (VCQ), Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria — 2Institute for Quantum Optics and Quantum Information (IQOQI) Vienna, Austrian Academy of Sciences, Boltzmanngasse 3, A-1090 Vienna, Austria — 3Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
Optically levitated silica nanoparticles in ultra-high vacuum promise access to quantum behavior of massive objects in a room-temperature environment, with applications ranging from sensing to testing fundamental physics. We have recently developed a new experimental interface, which combines stable trapping potentials of optical tweezers with the cooling performance of optical cavities and demonstrated operation at desired experimental conditions. Furthermore, we implemented a new cooling method – cavity cooling by coherent scattering – which resolves typical technical issues of high phase noise at low motional frequencies and co-trapping by the cavity. We employ this method to demonstrate ground state cooling of the nanoparticle motion, a first step towards its full quantum control. In this talk I will compare its performance to standard (dispersive) optomechanical interaction and present our latest experimental results.