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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Different unravelings of open quantum systems cannot be distinguished by any protocol without prior knowledge of the measurement scheme, since access to unraveling-dependent nonlinear statistics would violate relativistic causality.
citing papers explorer
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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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Theoretical Limits of Protocols for Distinguishing Different Unravelings
Different unravelings of open quantum systems cannot be distinguished by any protocol without prior knowledge of the measurement scheme, since access to unraveling-dependent nonlinear statistics would violate relativistic causality.