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Cold Damping of an Optically Levitated Nanoparticle to micro-Kelvin Temperatures

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arxiv 1812.09875 v1 pith:GCOVAOMQ submitted 2018-12-24 physics.optics

Felix Tebbenjohanns , Martin Frimmer , Andrei Militaru , Vijay Jain , Lukas Novotny This is my paper · ORCID
classification physics.optics
keywords levitatedopticallytemperaturecolddampingmicro-kelvinnanoparticleagreement
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We implement a cold damping scheme to cool one mode of the center-of-mass motion of an optically levitated nanoparticle in ultrahigh vacuum from room temperature to a record-low temperature of 100 micro-Kelvin. The measured temperature dependence on feedback gain and thermal decoherence rate is in excellent agreement with a parameter-free model. We determine the imprecision-backaction product for our system and provide a roadmap towards ground-state cooling of optically levitated nanoparticles.

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