Journal
PHYSICAL REVIEW LETTERS
Volume 122, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.223601
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Funding
- ERC-QMES [338763]
- NCCR-QSIT program [51NF40-160591]
- European Research Council (ERC) [338763] Funding Source: European Research Council (ERC)
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We implement a cold-damping scheme to cool one mode of the center-of-mass motion of an optically levitated nanoparticle in ultrahigh vacuum (10(-8) mbar) from room temperature to a record-low temperature of 100 mu K. The measured temperature dependence on the feedback gain and thermal decoherence rate is in excellent agreement with a parameter-free model. For the first time, we determine the imprecision-backaction product for a levitated optomechanical system and discuss the resulting implications for ground-state cooling of an optically levitated nanoparticle.
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