Levitated nanomechanical oscillator senses 10 zeptonewton forces below quantum zero-point fluctuation by preparing a squeezed state through potential modulation and detecting force via time-of-flight displacement.
cos2 ω1tSP + ω0 ω1 2 sin2 ω1tSP # , (S3) V SP zp = κℏ 4 ω0 ω1 − ω1 ω0 sin 2ω1tSP, (S4) V SP pp = κℏmω0 2
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Time-of-flight force sensing below the quantum zero-point fluctuation
Levitated nanomechanical oscillator senses 10 zeptonewton forces below quantum zero-point fluctuation by preparing a squeezed state through potential modulation and detecting force via time-of-flight displacement.