悬浮振荡器与光场的稳态纠缠

Q. Deplano1,2†, A. Pontin3†, F. Marino2,3, F. Marin1,2,3,4* Stationary entanglement between the motion of macroscopic objects and light is a long- standing goal of quantum optomechanics, with implications for both fundamental tests of quantum physics and emerging quantum technologies. We report the generation of quantum entanglement between the center- of- mass motion of a nanosphere levitated in an optical tweezer inside an optical cavity and the electromagnetic field. Using heterodyne detection, we reconstructed the full set of optomechanical correlations and observed a violation of separability bounds between the mechanical motion and a propagating optical mode, demonstrating the distribution of nonclassical correlations beyond the interaction region. …