Quantum Backaction Evading Measurement of Collective Mechanical Modes

C. F. Ockeloen-Korppi; Erno Damskägg; J. -M. Pirkkalainen; A. A. Clerk; M. J. Woolley; Mika Sillanpää

doi:10.1103/PhysRevLett.117.140401

Quantum Backaction Evading Measurement of Collective Mechanical Modes

C. F. Ockeloen-Korppi, Erno Damskägg, J. -M. Pirkkalainen, A. A. Clerk, M. J. Woolley, Mika Sillanpää

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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.

Original language	English
Article number	140401
Pages (from-to)	1-6
Number of pages	6
Journal	Physical Review Letters
Volume	117
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.117.140401
Publication status	Published - 26 Sep 2016
MoE publication type	A1 Journal article-refereed

Keywords

NANOMECHANICAL MOTION
CAVITY OPTOMECHANICS
NOISE
OSCILLATOR
SCHEME
STATE
LIMIT

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10.1103/PhysRevLett.117.140401

PhysRevLett.117Final published version, 615 KB

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2 Finished

Centre of Excellence in Low Temperature Quantum Phenomena and Devices
Sillanpää, M.
01/01/2015 → 31/12/2017
Project: Academy of Finland: Other research funding
CAVITYQPD: Cavity quantum phonon dynamics
Välimaa, A., Ockeloen-Korppi, C., Santos, J. T., Damskägg, E., Sillanpää, M., Rissanen, I., Mahato, S., Mercier de Lepinay, L., Crump, W., Mishra, H., Kervinen, M., Brandt, M., Sulkko, J., Pirkkalainen, J., Tong, F., Wang, C. & Zhou, J.
20/11/2014 → 31/12/2020
Project: EU: ERC grants

OtaNano – Low Temperature Laboratory
Alexander Savin (Manager)
OtaNano
Facility/equipment: Facility

Cite this

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title = "Quantum Backaction Evading Measurement of Collective Mechanical Modes",

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.",

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AU - Damskägg, Erno

AU - Pirkkalainen, J. -M.

AU - Clerk, A. A.

AU - Woolley, M. J.

AU - Sillanpää, Mika

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KW - NANOMECHANICAL MOTION

KW - CAVITY OPTOMECHANICS

KW - NOISE

KW - OSCILLATOR

KW - SCHEME

KW - STATE

KW - LIMIT

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JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 14

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ER -

Quantum Backaction Evading Measurement of Collective Mechanical Modes

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Keywords

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Projects

Centre of Excellence in Low Temperature Quantum Phenomena and Devices

CAVITYQPD: Cavity quantum phonon dynamics

Equipment

OtaNano – Low Temperature Laboratory

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