3 years ago

Real-Time Kalman Filter: Cooling of an Optically Levitated Nanoparticle.

Jason F. Ralph, Ashley Setter, Hendrik Ulbricht, Marko Toroš

We demonstrate that a Kalman filter applied to estimate the position of an optically levitated nanoparticle, and operated in real-time within a Field Programmable Gate Array (FPGA), is sufficient to perform closed-loop parametric feedback cooling of the centre of mass motion to sub-Kelvin temperatures. The translational centre of mass motion along the optical axis of the trapped nanoparticle has been cooled by three orders of magnitude, from a temperature of 300K to a temperature of 162 +/- 15mK.

Publisher URL: http://arxiv.org/abs/1712.07921

DOI: arXiv:1712.07921v2

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