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5 March 2021 Towards precision pulsed levitated optomechanics in a magneto-gravitational trap
Brian D'Urso, Bradley R. Slezak, Charles W Lewandowski
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Proceedings Volume 11700, Optical and Quantum Sensing and Precision Metrology; 117001L (2021) https://doi.org/10.1117/12.2586987
Event: SPIE OPTO, 2021, Online Only
Abstract
Magneto-gravitational traps use the repulsion of diamagnetic materials by magnetic fields combined with the Earth's gravity to create a weak trap for micrometer-scale diamagnetic particles. A single particle levitated in this trap oscillates harmonically in three dimensions and its position can be measured optically. We have previously demonstrated feedback cooling of a trapped particle using radiation pressure from a second light source, but the low frequencies of oscillation appear to make quantum behavior unreachable, at least on long time scales. We report on progress towards observing the quantum limit of the motion by optical measurements of the particle position on time scales short compared to the oscillation period of the motion, making the behavior approach that of a free particle. We also show that classical pulsed measurements on larger trapped particles can reach remarkably high precision and demonstrate the performance by using it to measure vibrations of the system.
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Brian D'Urso, Bradley R. Slezak, and Charles W Lewandowski "Towards precision pulsed levitated optomechanics in a magneto-gravitational trap", Proc. SPIE 11700, Optical and Quantum Sensing and Precision Metrology, 117001L (5 March 2021); https://doi.org/10.1117/12.2586987
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KEYWORDS
Optomechanical design
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