Controlling out-of-equilibrium nano-systems to reach the quantum regime

by Dr. Salambô Dago

University of Vienna

at Quantum optics seminar

Wed, 12 Nov 2025, 16:00
Zoom only

Abstract

Link: https://us02web.zoom.us/j/85132785818?pwd=MWO1qfavecdoRvQRK8FaPa75l68jGC.1

Feedback control provides a versatile tool for manipulating nanoscale systems dominated by thermal or quantum fluctuations. We present applications of feedback to reach the quantum regime with nano-objects. We introduce FLIP (Feedback Stabilization on an Inverted Potential), a novel feedback scheme combining Kalman filtering with optical trapping to achieve quantum control [1] and ground-state cooling of levitated nanospheres. This approach allows stable levitation in a double-well configuration while mitigating absorption, opening new routes for optical manipulation at the quantum limit [2].
[1] L. Magrini, P. Rosenzweig, C. Bach, A. Deutschmann-Olek, S. G. Hofer, S. Hong, N. Kiesel, A. Kugi Nature 595, 373 (2021).
[2] S. Dago, J. Rieser, M. Ciampini, V. Mlynar, M. Aspelmeyer, A. Deutschmann-Olek et N. Kiesel Optics Express 32, 45133-45141 (2024)

Created on 09-11-2025 by Folman, Ron (folman)
Updaded on 09-11-2025 by Folman, Ron (folman)