SAMOP 2023 – scientific programme
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QI: Fachverband Quanteninformation
QI 32: Quantum Optics and Quantum Information with Rigid Rotors (joint session MO/Q/QI)
QI 32.1: Talk
Thursday, March 9, 2023, 14:30–14:45, F102
Cooling and control of the translational and rotational motion of a nano rotor — •Peter Barker1, Antonio Pontin1, Marko Toros2, Hayden Fu1, Tania Monteiro1, Jonathan Gosling1, and Markus Rademacher1 — 1University College London, UK — 2University of Glasgow, Glasgow, UK
There has been significant interest in controlling the motional degrees of isolated, single nanoparticles, trapped within optical fields in high vacuum. They are seen as ideal candidates for exploring the limits of quantum mechanics in a new mass regime while they are also massive enough to be considered for future laboratory tests of the quantum nature of gravity. In this talk I will report on the control and cooling of all translational and rotational degrees of freedom of a nanoparticle trapped in an optical tweezer using cooling via coherent elliptic scattering where translational temperatures in the 100 $\mu$K range were reached, while temperatures as low as $5$\,mK were attained in the librational degrees of freedom. I will also outline nanoparticle characterisation techniques based on the control and measurement of the librational and translational motion. This work opens up future applications in quantum science and the characterisation of single isolated nanoparticles free of interference from a substrate.