Cold atoms as a coolant for levitated optomechanical systems

Gambhir Ranjit, Cris Montoya, Andrew A. Geraci

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


Optically trapped dielectric objects are well suited for reaching the quantum regime of their center-of-mass motion in an ultrahigh-vacuum environment. We show that ground-state cooling of an optically trapped nanosphere is achievable when starting at room temperature, by sympathetic cooling of a cold-atomic gas optically coupled to the nanoparticle. Unlike cavity cooling in the resolved-sideband limit, this system requires only a modest cavity finesse and it allows the cooling to be turned off, permitting subsequent observation of strongly coupled dynamics between the atoms and sphere. Nanospheres cooled to their quantum ground state could have applications in quantum information science or in precision sensing.

Original languageEnglish (US)
Article number013416
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number1
StatePublished - Jan 28 2015

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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