Quantum Backaction Evading Measurement of Collective Mechanical Modes
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2016-09-26
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en
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6
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Physical Review Letters, Volume 117, issue 14, pp. 1-6
Abstract
The standard quantum limit constrains the precision of an oscillator position measurement. It arises from a balance between the imprecision and the quantum backaction of the measurement. However, a measurement of only a single quadrature of the oscillator can evade the backaction and be made with arbitrary precision. Here we demonstrate quantum backaction evading measurements of a collective quadrature of two mechanical oscillators, both coupled to a common microwave cavity. The work allows for quantum state tomography of two mechanical oscillators, and provides a foundation for macroscopic mechanical entanglement and force sensing beyond conventional quantum limits.Description
Keywords
NANOMECHANICAL MOTION, CAVITY OPTOMECHANICS, NOISE, OSCILLATOR, SCHEME, STATE, LIMIT
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Citation
Ockeloen-Korppi, C F, Damskägg, E, Pirkkalainen, J -M, Clerk, A A, Woolley, M J & Sillanpää, M 2016, ' Quantum Backaction Evading Measurement of Collective Mechanical Modes ', Physical Review Letters, vol. 117, no. 14, 140401, pp. 1-6 . https://doi.org/10.1103/PhysRevLett.117.140401