Two optically trapped nanoparticles are coupled together by photons bouncing back and forth between mirrors Description: The image shows two nanoparticles (green) trapped by optical tweezers / laser beams (red) and placed in between two mirrors (white) which forms an optical cavity (periodic blue blobs). The photons scattered by the nanoparticles (squiggly purple arrows) are trapped in the cavity, resulting in an interaction between the two nanoparticles (straight purple line). Credit: The University of Manchester
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