An optically levitated silica nanoparticle was released, fell freely for up to 0.25 ms under gravity, was recaptured by a second optical tweezer, and showed an approximately 190-fold growth in position uncertainty.
The second term is associated with the average momentum gained during free-fall ( ⟨p⟩ = −gmτ ), and becomes comparable to the trap depth only at long times τ ≈ 54 ms
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Trap-to-trap free falls with an optically levitated nanoparticle
An optically levitated silica nanoparticle was released, fell freely for up to 0.25 ms under gravity, was recaptured by a second optical tweezer, and showed an approximately 190-fold growth in position uncertainty.