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

• URL: http://arxiv.org/abs/2204.13684v3
• Date: Wed, 14 Jun 2023 10:20:11 GMT
• Title: Force-Gradient Sensing and Entanglement via Feedback Cooling of Interacting Nanoparticles
• Authors: Henning Rudolph, Uro\v{s} Deli\'c, Markus Aspelmeyer, Klaus Hornberger, and Benjamin A. Stickler
• Abstract summary: We show that feedback-cooling of two levitated, interacting nanoparticles enables differential sensing of forces and the observation of stationary entanglement. 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.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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, non-thermal state which is susceptible to inhomogeneous force fields and which exhibits entanglement for sufficiently strong inter-particle 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.

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