Stabilizing nanoparticles in the intensity minimum: feedback levitation on an inverted potential

Autor(en)

Salambô Dago, J. Rieser, M. A. Ciampini, V. Mlynář, A. Kugi, M. Aspelmeyer, A. Deutschmann-Olek, N. Kiesel

Abstrakt

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(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Technische Universität Wien, Austrian Institute of Technology, Österreichische Akademie der Wissenschaften (ÖAW)

Journal

Optics Express

Band

32

Seiten

45133-45141

Anzahl der Seiten

9

ISSN

1094-4087

DOI

https://doi.org/10.48550/arXiv.2410.17253

Publikationsdatum

12-2024

Peer-reviewed

Ja

ÖFOS 2012

103021 Optik, 103025 Quantenmechanik

ASJC Scopus Sachgebiete

Atomic and Molecular Physics, and Optics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/4bdffa07-a23f-4a55-a866-4007b5cefa1a