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