Stationary entanglement of a levitated oscillator with an optical field

• URL: http://arxiv.org/abs/2602.03456v1
• Date: Tue, 03 Feb 2026 12:22:23 GMT
• Title: Stationary entanglement of a levitated oscillator with an optical field
• Authors: Q. Deplano, A. Pontin, F. Marino, F. Marin,
• Abstract summary: We report the generation of quantum entanglement between the center-of-mass motion of a levitated nanosphere, coupled by coherent scattering to an optical cavity mode, and the electromagnetic field.<n>Using heterodyne detection, we reconstruct the full set of optical-mechanical correlations and observe a violation of separability bounds between the mechanical degrees of freedom and the propagating optical mode.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We report the generation of quantum entanglement between the center-of-mass motion of a levitated nanosphere, coupled by coherent scattering to an optical cavity mode, and the electromagnetic field. Using heterodyne detection, we reconstruct the full set of optical-mechanical correlations and observe a violation of separability bounds between the mechanical degrees of freedom and the propagating optical mode. Thus, we demonstrate the ability to distribute nonclassical correlations beyond the interaction region. Our results are obtained at room temperature and are robust over a broad range of detunings set by the cavity linewidth. These findings establish levitated optomechanical systems as a promising platform for macroscopic quantum optics and for future tests of fundamental physics.

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