5-mg suspended mirror driven by measurement-induced backaction

Nobuyuki Matsumoto; Kentaro Komori; Yuta Michimura; Gen Hayase; Yoichi Aso; Kimio Tsubono

doi:10.1103/PhysRevA.92.033825

5-mg suspended mirror driven by measurement-induced backaction

Nobuyuki Matsumoto, Kentaro Komori, Yuta Michimura, Gen Hayase, Yoichi Aso, Kimio Tsubono

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Quantum mechanics predicts superpositions of position states even for macroscopic objects. Recently, the use of a quasifreely suspended mirror combined with a laser was proposed to prepare such states [H. Müller-Ebhardt, Phys. Rev. Lett. 100, 013601 (2008)PRLTAO0031-900710.1103/PhysRevLett.100.013601]. One of the key milestones towards this goal is the preparation of the mechanical oscillator mainly driven by measurement-induced backaction in the quantum regime. Here we describe the observation of backaction acting on a suspended 5-mg mirror in the classical regime. Furthermore, its quantum component is estimated to be larger than the thermal fluctuating force due to internal damping of the suspension, by a factor of 1.4±0.2 at 325 Hz.

Original language	English
Article number	033825
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	92
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevA.92.033825
Publication status	Published - 2015 Sep 15
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.92.033825

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title = "5-mg suspended mirror driven by measurement-induced backaction",

abstract = "Quantum mechanics predicts superpositions of position states even for macroscopic objects. Recently, the use of a quasifreely suspended mirror combined with a laser was proposed to prepare such states [H. M{\"u}ller-Ebhardt, Phys. Rev. Lett. 100, 013601 (2008)PRLTAO0031-900710.1103/PhysRevLett.100.013601]. One of the key milestones towards this goal is the preparation of the mechanical oscillator mainly driven by measurement-induced backaction in the quantum regime. Here we describe the observation of backaction acting on a suspended 5-mg mirror in the classical regime. Furthermore, its quantum component is estimated to be larger than the thermal fluctuating force due to internal damping of the suspension, by a factor of 1.4±0.2 at 325 Hz.",

author = "Nobuyuki Matsumoto and Kentaro Komori and Yuta Michimura and Gen Hayase and Yoichi Aso and Kimio Tsubono",

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doi = "10.1103/PhysRevA.92.033825",

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AU - Matsumoto, Nobuyuki

AU - Komori, Kentaro

AU - Michimura, Yuta

AU - Hayase, Gen

AU - Aso, Yoichi

AU - Tsubono, Kimio

PY - 2015/9/15

Y1 - 2015/9/15

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AB - Quantum mechanics predicts superpositions of position states even for macroscopic objects. Recently, the use of a quasifreely suspended mirror combined with a laser was proposed to prepare such states [H. Müller-Ebhardt, Phys. Rev. Lett. 100, 013601 (2008)PRLTAO0031-900710.1103/PhysRevLett.100.013601]. One of the key milestones towards this goal is the preparation of the mechanical oscillator mainly driven by measurement-induced backaction in the quantum regime. Here we describe the observation of backaction acting on a suspended 5-mg mirror in the classical regime. Furthermore, its quantum component is estimated to be larger than the thermal fluctuating force due to internal damping of the suspension, by a factor of 1.4±0.2 at 325 Hz.

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5-mg suspended mirror driven by measurement-induced backaction

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