Force-Gradient Sensing and Entanglement via Feedback Cooling of Interacting Nanoparticles

Author(s)
Henning Rudolph, Uroš Delić, Markus Aspelmeyer, Klaus Hornberger, Benjamin A. Stickler
Abstract

We show theoretically that feedback cooling of two levitated, interacting nanoparticles enables differential sensing of forces and the observation of stationary entanglement. The feedback drives the two particles into a stationary, nonthermal state which is susceptible to inhomogeneous force fields and which exhibits entanglement for sufficiently strong interparticle couplings. We predict that force-gradient sensing at the zepto-Newton per micron range is feasible and that entanglement due to the Coulomb interaction between charged particles can be realistically observed in state-of-the-art setups.

Organisation(s)
Quantum Optics, Quantum Nanophysics and Quantum Information
External organisation(s)
Universität Duisburg-Essen, Österreichische Akademie der Wissenschaften (ÖAW)
Journal
Physical Review Letters
Volume
129
No. of pages
7
ISSN
0031-9007
DOI
https://doi.org/10.1103/PhysRevLett.129.193602
Publication date
11-2022
Peer reviewed
Yes
Austrian Fields of Science 2012
103025 Quantum mechanics
ASJC Scopus subject areas
Physics and Astronomy(all)
Portal url
https://ucris.univie.ac.at/portal/en/publications/forcegradient-sensing-and-entanglement-via-feedback-cooling-of-interacting-nanoparticles(3360971d-8d5e-4bec-9e41-65dcd54627b5).html