All-optical sub-Kelvin sympathetic cooling of a levitated microsphere in
  vacuum

Arita, Yoshihiko; Bruce, Graham D.; Wright, Ewan M.; Simpson, Stephen H.; Zemánek, Pavel; Dholakia, Kishan

doi:10.48550/arXiv.2210.01458

All-optical sub-Kelvin sympathetic cooling of a levitated microsphere in vacuum

preprint

posted on 2023-01-10, 02:56 authored by Yoshihiko Arita, Graham D. Bruce, Ewan M. Wright, Stephen H. Simpson, Pavel Zemánek, Kishan Dholakia

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