Ultra-high quality factor of a levitated nanomechanical oscillator
arxiv(2023)
摘要
A levitated nanomechanical oscillator under ultra-high vacuum (UHV) is highly
isolated from its environment. It has been predicted that this isolation leads
to very low mechanical dissipation rates. However, a gap persists between
predictions and experimental data. Here, we levitate a silica nanoparticle in a
linear Paul trap at room temperature, at pressures as low as 7×10^-11
mbar. We measure a dissipation rate of 2π×69(22) nHz, corresponding to
a quality factor exceeding 10^10, more than two orders of magnitude higher
than previously shown. A study of the pressure dependence of the particle's
damping and heating rates provides insight into the relevant dissipation
mechanisms.
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