Stabilizing nanoparticles in the intensity minimum: feedback levitation on an inverted potential
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913576357199872 |
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| author | Dago, Salambô Rieser, Jakob Ciampini, Mario A. Mlynář, Vojtech Kugi, Andreas Aspelmeyer, Markus Deutshmann-Olek, Andreas Kiesel, Nikolai |
| author_facet | Dago, Salambô Rieser, Jakob Ciampini, Mario A. Mlynář, Vojtech Kugi, Andreas Aspelmeyer, Markus Deutshmann-Olek, Andreas Kiesel, Nikolai |
| contents | We demonstrate the stable trapping of a levitated nanoparticle on top of an inverted potential using a combination of optical readout and electrostatic control. The feedback levitation on an inverted potential (FLIP) method stabilizes the particle at an intensity minimum. By using a Kalman-filter-based linear-quadratic-Gaussian (LQG) control method, we confine a particle to within $σ_x = (9.0 \pm 0.5) nm$ of the potential maximum at an effective temperature of $(16 \pm 1) K$ in a room-temperature environment. Despite drifts in the absolute position of the potential maximum, we can keep the nanoparticle at the apex by estimating the drift from the particle dynamics using the Kalman filter. Our approach may enable new levitation-based sensing schemes with enhanced bandwidth. It also paves the way for optical levitation at zero intensity of an optical potential, which alleviates decoherence effects due to material-dependent absorption and is hence relevant for macroscopic quantum experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_17253 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Stabilizing nanoparticles in the intensity minimum: feedback levitation on an inverted potential Dago, Salambô Rieser, Jakob Ciampini, Mario A. Mlynář, Vojtech Kugi, Andreas Aspelmeyer, Markus Deutshmann-Olek, Andreas Kiesel, Nikolai Optics Quantum Physics We demonstrate the stable trapping of a levitated nanoparticle on top of an inverted potential using a combination of optical readout and electrostatic control. The feedback levitation on an inverted potential (FLIP) method stabilizes the particle at an intensity minimum. By using a Kalman-filter-based linear-quadratic-Gaussian (LQG) control method, we confine a particle to within $σ_x = (9.0 \pm 0.5) nm$ of the potential maximum at an effective temperature of $(16 \pm 1) K$ in a room-temperature environment. Despite drifts in the absolute position of the potential maximum, we can keep the nanoparticle at the apex by estimating the drift from the particle dynamics using the Kalman filter. Our approach may enable new levitation-based sensing schemes with enhanced bandwidth. It also paves the way for optical levitation at zero intensity of an optical potential, which alleviates decoherence effects due to material-dependent absorption and is hence relevant for macroscopic quantum experiments. |
| title | Stabilizing nanoparticles in the intensity minimum: feedback levitation on an inverted potential |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2410.17253 |