Mainz 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 55: Optomechanics
Q 55.8: Vortrag
Donnerstag, 5. März 2026, 16:15–16:30, P 2
Entanglement of nanoparticles via Coulomb force under optimal control — •Nancy Gupta1,2, Ayub Khodaee1,2, Klemens Winkler1, Kaspar Schmerling3, Andreas Deutschmann-Olek3, Nikolai Kiesel1, Anton Zasedatelev5, Uroš Delić4, and Markus Aspelmeyer1,2 — 1University of Vienna, Faculty of Physics, Vienna Center for Quantum Science and Technology (VCQ), Boltzmanngasse 5, A-1090 Vienna, Austria — 2Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, A-1090 Vienna, Austria. — 3Automation and Control Institute (ACIN), TU Wien, 1040 Vienna, Austria — 4Atominstitut, TU Wien — 5Department of Applied Physics, Aalto University
Optomechanics with levitated particles offers a powerful route to explore quantum behavior at macroscopic scales, including ground-state cooling. A central goal is to entangle the motion of two levitated nanoparticles to study decoherence, but weak interactions have limited the experimental progress. We address this challenge using electrostatic Coulomb forces between two optically trapped silica particles. By employing active and passive charging, we achieve strong coupling with an interaction strength of 17 percent of the mechanical frequency and realise cooling and readout of the coupled modes. Because steady-state entanglement demands stronger coupling, we introduce an optimal-control protocol that exploits time-dependent interactions in a continuously measured system. This approach relaxes coupling requirements and enables unconditional entanglement while addressing stabilization, feedback, and noise near the ground state.
Keywords: Macroscopic Quantum States; Entanglement; Optimal Control; Active feedback control; Quantum Control