Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 36: Optomechanics II
Q 36.5: Talk
Wednesday, March 16, 2022, 15:00–15:15, Q-H13
Quantum control of a nanoparticle optically levitated in cryogenic free space — •Felix Tebbenjohanns1,2, Maria Luisa Mattana1, Massimiliano Rossi1, Martin Frimmer1, and Lukas Novotny1 — 1Photonics Laboratory, ETH Zürich, 8093 Zürich, Switzerland — 2Currently with the Department of Physics, Humboldt-Universität zu Berlin, 10099 Berlin
Nanospheres levitated in optical tweezers are a versatile platform and have become an indispensable tool across many disciplines ranging from biology to physics. The key ingredient, radiation pressure, couples light to mechanical motion of macroscopic objects. In an ultra-high vacuum, the system can be sufficiently decoupled from its environment, such that this optomechanical interaction becomes dominant over all other sources of heat, a prerequisite to ground-state cool the system. In my talk, I will explain how we employed a measurement-based feedback mechanism to cool the mechanical motion of a levitated nanosphere to 0.65 quanta of motion, opening the door for levitated quantum optomechanics.
[1] L. Magrini, P. Rosenzweig, C. Bach. et al. Nature 595, 373 (2021).
[2] F. Tebbenjohanns, M.L. Mattana, M. Rossi, et al. Nature 595, 378 (2021)