Stabilizing nanoparticles in the intensity minimum: feedback levitation on an inverted potential
- Author(s)
- Salambô Dago, J. Rieser, M. A. Ciampini, V. Mlynář, A. Kugi, M. Aspelmeyer, A. Deutschmann-Olek, N. Kiesel
- Abstract
We demonstrate the stable trapping of a levitated nanoparticle at the apex 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 σx = 9 ± 0.5 nm of the potential maximum at an effective temperature of 16(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.
- Organisation(s)
- Quantum Optics, Quantum Nanophysics and Quantum Information
- External organisation(s)
- Technische Universität Wien, Austrian Institute of Technology, Österreichische Akademie der Wissenschaften (ÖAW)
- Journal
- Optics Express
- Volume
- 32
- Pages
- 45133-45141
- No. of pages
- 9
- ISSN
- 1094-4087
- DOI
- https://doi.org/10.48550/arXiv.2410.17253
- Publication date
- 12-2024
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103021 Optics, 103025 Quantum mechanics
- ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/4bdffa07-a23f-4a55-a866-4007b5cefa1a