Linear combination estimator of multiple-outcome detections with discrete measurement outcomes

Zhou, L. K.; Xu, Jia-Min; Zhang, W.-Z.; Cheng, Jiong; Yin, Tai-Shuang; Yu, Ya Jun; Chen, Rui-Pin; Chen, A. X.; Jin, Guangri; Yang, Wen

doi:10.1103/physreva.103.043702

Cited by 7 publications

(1 citation statement)

References 56 publications

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“…Quantum measurement is an important technology in quantum information science. [1][2][3][4] The bound of the detection accuracy is essentially due to Heisenberg uncertainty relationship. [5,6] Quantum parameter estimation can be used to find this limit in the precision of quantum measurement.…”

Section: Introductionmentioning

confidence: 99%

Quantum estimation of rotational speed in optomechanics

Cheng

2023

Chinese Phys. B

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In this paper, we study the quantum Fisher information (QFI) of the angular velocity of rotation in an optomechanical system. Based on the Gaussian measurements method, We derive the explicitly form of single-mode Gaussian QFI, which is valid for arbitrary angular velocity of rotation. The information about the angular velocity to be measured is all contained in the optical covariance matrix, which can be experimentally determined via homodyne measurement. We find that, QFI increases rapidly when diving the system close to the unstable boundary. This result can be attributed to the strong nonlinearity of the system at the unstable boundary. Our results indicates the possibility of using optomechanical system for high precision detection of the angular velocity of rotation.

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Section: Introductionmentioning

confidence: 99%

Quantum estimation of rotational speed in optomechanics

Cheng

2023

Chinese Phys. B

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Quantum phase estimation with a general binary-outcome measurement

et al. 2022

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Double-port homodyne detection in a squeezed-state interferometry with a binary-outcome data processing

Zhou¹,

Liu²,

Jin³

2022

Commun. Theor. Phys.

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Performing homodyne detection at a single output port of a squeezed-state light interferometer and then separating the measurement quadrature into two intervals can realize super-resolving and super-sensitive phase measurements, which is equivalent to a binary-outcome measurement. Obviously, the single-port homodyne detection may lose almost part of the phase information, reducing the estimation precision. Here, we propose a data-processing technique over the double-port homodyne detection, where the two-dimensional measurement quadrature (p1, p2) has been divided into two regions. With such a binary-outcome measurement, we estimate the phase shift accumulated in the interferometer by inverting the output signal. By analyzing the full width at half maximum of the signal and the phase sensitivity, we show that both the resolution and the achievable sensitivity are better than that of the previous binary-outcome scheme.

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Linear combination estimator of multiple-outcome detections with discrete measurement outcomes

Cited by 7 publications

References 56 publications

Quantum estimation of rotational speed in optomechanics

Quantum estimation of rotational speed in optomechanics

Quantum phase estimation with a general binary-outcome measurement

Double-port homodyne detection in a squeezed-state interferometry with a binary-outcome data processing

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