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.
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The likelihood ratio test on full position probability distributions certifies macroscopic quantum mechanics with an exponential reduction in required measurements compared to visibility-based methods.
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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.
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Certifying Macroscopic Quantum Mechanics via Hypothesis Testing with Finite Data
The likelihood ratio test on full position probability distributions certifies macroscopic quantum mechanics with an exponential reduction in required measurements compared to visibility-based methods.