The radiation pressure of two laser beams detuned from resonance in an optical cavity can create a stable optical trap for a mechanical oscillation mode of a movable cavity mirror. Here it is shown that such a configuration entangles the output light fields via interaction with a mirror that is suspended as a pendulum. The degree of entanglement is quantified spectrally using the logarithmic negativity, and related to the available optical restoring force. Entanglement survives in the experimentally accessible regime of gram-scale masses subject to thermal noise at room temperature. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Publication Source (Journal or Book title)
New Journal of Physics
Wipf, C., Corbitt, T., Chen, Y., & Mavalvala, N. (2008). Route to ponderomotive entanglement of light via optically trapped mirrors. New Journal of Physics, 10 https://doi.org/10.1088/1367-2630/10/9/095017