Quantum-mechanics free subsystem with mechanical oscillators

Abstract

Quantum mechanics sets a limit for the precision of continuous measurement of the position of an oscillator. Here we show how it is possible to measure an oscillator without quantum backaction of the measurement by constructing one effective oscillator from two physical oscillators. We realize such a quantum-mechanics free subsystem using two micromechanical oscillators, and show the measurements of two collective quadratures while evading the quantum backaction by $8$ decibels on both of them, obtaining a total noise within a factor two of the full quantum limit. This facilitates detection of weak forces and the generation and measurement of nonclassical motional states of the oscillators. Moreover, we directly verify the quantum entanglement of the two oscillators by measuring the Duan quantity $1.4$ decibels below the separability bound.

References in corpus (7)

• Circuit cavity electromechanics in the strong coupling regime
• Nanomechanical motion measured with precision beyond the standard quantum limit
• Observation of Radiation Pressure Shot Noise on a Macroscopic Object
• Two-mode squeezed states in cavity optomechanics via engineering of a single reservoir
• Evading quantum mechanics
• Quantum back-action evading measurement of collective mechanical modes
• Observation of back-action cancellation in interferometric and weak force measurements

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