Squeezed light and coherent feedback enhanced multiparameter quantum estimation in a double-cavity optomechanics: steady and dynamical states
Abstract
Multiparameter quantum estimation in open optomechanical systems is fundamentally constrained by dissipation, thermal fluctuations, and measurement incompatibility. In this work, we investigate a coupled cavity optomechanical platform in which two mechanical modes interact with driven optical cavities, two mode squeezed vacuum, intracavity degenerate parametric amplification, and coherent optical feedback. Using the continuous variable Gaussian state formalism, we derive the linearized quantum Langevin dynamics and steady state covariance matrix and evaluate the quantum Fisher information matrices associated with simultaneous estimation of the optomechanical coupling strength and cavity dissipation rate. We characterize the precision bounds using the symmetric and right logarithmic derivative formalisms and employ ℬMI=max{ℬS,ℬR} as a comparative figure of merit within the SLD/RLD framework. We find that parametric amplification can substantially reduce the most informative bound, ℬMI, thereby enhancing multiparameter estimation precision over a broad range of operating conditions. Coherent feedback can further reduce ℬMI and improve the estimation precision, particularly in the strong feedback regime. Moreover, the simultaneous presence of coherent feedback, parametric amplification, and squeezed light injection provides a combined mechanism for controlling quantum fluctuations and parameter dependent correlations, leading to enhanced and more robust multiparameter estimation. We further analyze the dynamical and steady state regimes to identify the parameter regions in which these quantum resources provide the largest metrological gain. Our results establish coupled cavity optomechanics as a flexible platform for quantum-noise engineering in multiparameter sensing.
Related
- Quantum theory of laser noise in coherent-scattering levitated optomechanics
- Multiparameter Maximum Information States for Coherent Diffraction Measurements
- Three-level laser with coherent and uncorrelated squeezed lights
- Unified Spectral, Dynamical, and Correlation Signatures of an Exceptional Point in Cavity Optomechanics
- Pulsed coherent and squeezed driving of a spin-S emitter as a deterministic source of Wigner-negative light
BibTeX
@misc{harraf2026squeezed,
title = {{Squeezed light and coherent feedback enhanced multiparameter quantum estimation in a double-cavity optomechanics: steady and dynamical states}},
author = {Hamza Harraf and Mohamed Amazioug and Amjad Sohail and Mojtaba Mazaheri and Rachid Ahl Laamara},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.05402},
eprint = {2609.05402},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.05402},
}
RIS
TY - UNPB
TI - Squeezed light and coherent feedback enhanced multiparameter quantum estimation in a double-cavity optomechanics: steady and dynamical states
AU - Hamza Harraf
AU - Mohamed Amazioug
AU - Amjad Sohail
AU - Mojtaba Mazaheri
AU - Rachid Ahl Laamara
PY - 2026
DA - 2026/09/12
PB - arXiv
DO - 10.48550/arxiv.2609.05402
UR - https://arxiv.org/abs/2609.05402
AB - Multiparameter quantum estimation in open optomechanical systems is fundamentally constrained by dissipation, thermal fluctuations, and measurement incompatibility. In this work, we investigate a coupled cavity optomechanical platform in which two mechanical modes interact with driven optical cavities, two mode squeezed vacuum, intracavity degenerate parametric amplification, and coherent optical feedback. Using the continuous variable Gaussian state formalism, we derive the linearized quantum Langevin dynamics and steady state covariance matrix and evaluate the quantum Fisher information matrices associated with simultaneous estimation of the optomechanical coupling strength and cavity dissipation rate. We characterize the precision bounds using the symmetric and right logarithmic derivative formalisms and employ ℬ_MI=max{ℬ_S,ℬ_R} as a comparative figure of merit within the SLD/RLD framework. We find that parametric amplification can substantially reduce the most informative bound, ℬ_MI, thereby enhancing multiparameter estimation precision over a broad range of operating conditions. Coherent feedback can further reduce ℬ_MI and improve the estimation precision, particularly in the strong feedback regime. Moreover, the simultaneous presence of coherent feedback, parametric amplification, and squeezed light injection provides a combined mechanism for controlling quantum fluctuations and parameter dependent correlations, leading to enhanced and more robust multiparameter estimation. We further analyze the dynamical and steady state regimes to identify the parameter regions in which these quantum resources provide the largest metrological gain. Our results establish coupled cavity optomechanics as a flexible platform for quantum-noise engineering in multiparameter sensing.
ER -