Quantum-limited mirror-motion estimation

Kohjiro Iwasawa; Kenzo Makino; Hidehiro Yonezawa; Mankei Tsang; Aleksandar Davidovic; Elanor Huntington; Akira Furusawa

doi:10.1103/PhysRevLett.111.163602

Quantum-limited mirror-motion estimation

Kohjiro Iwasawa^*
, Kenzo Makino
, Hidehiro Yonezawa
, Mankei Tsang
, Aleksandar Davidovic
, Elanor Huntington
, Akira Furusawa

^*Corresponding author for this work

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

56 Citations (Scopus)

Abstract

We experimentally demonstrate optomechanical motion and force measurements near the quantum precision limits set by the quantum Cramér-Rao bounds. Optical beams in coherent and phase-squeezed states are used to measure the motion of a mirror under an external stochastic force. Utilizing optical phase tracking and quantum smoothing techniques, we achieve position, momentum, and force estimation accuracies close to the quantum Cramér-Rao bounds with the coherent state, while the estimation using squeezed states shows clear quantum enhancements beyond the coherent-state bounds.

Original language	English
Article number	163602
Journal	Physical Review Letters
Volume	111
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.111.163602
Publication status	Published - 18 Oct 2013
Externally published	Yes

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10.1103/PhysRevLett.111.163602

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abstract = "We experimentally demonstrate optomechanical motion and force measurements near the quantum precision limits set by the quantum Cram{\'e}r-Rao bounds. Optical beams in coherent and phase-squeezed states are used to measure the motion of a mirror under an external stochastic force. Utilizing optical phase tracking and quantum smoothing techniques, we achieve position, momentum, and force estimation accuracies close to the quantum Cram{\'e}r-Rao bounds with the coherent state, while the estimation using squeezed states shows clear quantum enhancements beyond the coherent-state bounds.",

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AU - Iwasawa, Kohjiro

AU - Makino, Kenzo

AU - Yonezawa, Hidehiro

AU - Tsang, Mankei

AU - Davidovic, Aleksandar

AU - Huntington, Elanor

AU - Furusawa, Akira

PY - 2013/10/18

Y1 - 2013/10/18

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AB - We experimentally demonstrate optomechanical motion and force measurements near the quantum precision limits set by the quantum Cramér-Rao bounds. Optical beams in coherent and phase-squeezed states are used to measure the motion of a mirror under an external stochastic force. Utilizing optical phase tracking and quantum smoothing techniques, we achieve position, momentum, and force estimation accuracies close to the quantum Cramér-Rao bounds with the coherent state, while the estimation using squeezed states shows clear quantum enhancements beyond the coherent-state bounds.

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Quantum-limited mirror-motion estimation

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