Coherent, measurement-free optical feedback cools a levitated nanoparticle to about 344 phonons, with phase noise identified as the main barrier to ground-state cooling.
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Cooling of an optically levitated nanoparticle via measurement-free coherent feedback
Coherent, measurement-free optical feedback cools a levitated nanoparticle to about 344 phonons, with phase noise identified as the main barrier to ground-state cooling.