00704nas a2200121 4500008004100000245008400041210006900125260000800194300001600202490000600218520029100224856006700515 2022 eng d00aAll-optical sub-Kelvin sympathetic cooling of a levitated microsphere in vacuum0 aAlloptical subKelvin sympathetic cooling of a levitated microsph cSep a1000–10020 v93 a

We demonstrate all-optical sympathetic cooling of a laser-trapped microsphere to sub-Kelvin temperatures, mediated by optical binding to a feedback-cooled adjacent particle. Our study opens prospects for multi-particle quantum entanglement and sensing in levitated optomechanics.

 uhttps://opg.optica.org/optica/abstract.cfm?URI=optica-9-9-1000