Phase-controlled robust quantum entanglement of remote mechanical oscillators

Liu, Jing-Xue; Yang, Jian-Yong; Lu, Tian-Xiang; Jiao, Ya-Feng; Jing, Hui

doi:10.1103/physreva.109.023519

Phys. Rev. A

2024

DOI: 10.1103/physreva.109.023519

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Phase-controlled robust quantum entanglement of remote mechanical oscillators

Jing-Xue Liu,

Jian-Yong Yang,

Tian-Xiang Lu

et al.

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Cited by 3 publications

References 101 publications

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Exploring Two‐Exciton Steerability and Nonlocality Dynamics in Two Open Microcavities Coupled by an Optical Fiber

Aldosari,

Hashem

2024

Annalen der Physik

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This work will explore the generations of quantum nonlocalities (as entanglement, Bellnonlocality, and steerability) for two quantum wells (excitons) in dissipative microcavities containing a linear optical medium. An optical fiber links the microcavities. The generated two‐exciton nonlocalities are explored by using Bell inequality, steering inequality, and entanglement of formation. For initial correlated and uncorrelated states, the ability of the excitation–photon–fiber interactions to produce new generation and robustness of the two‐exciton nonlocality is investigated under the effects of the couplings of the exciton–photon and fiber–photon interactions as well as of the dissipations and the optical susceptibility. It is found that increasing the optical susceptibility enhances the regularity and amplitudes, reduces the frequencies of two‐exciton nonlocality dynamics, and supports dissipation degradations. For the initial uncorrelated state, decreasing the difference between the exciton–photon and fiber–photon couplings enhances the generations of the nonlocalities. For the initial correlated state, increasing the exciton–photon and fiber–photon couplings enhances the nonlocality conservation. For open microcavites, increasing the exciton–photon and fiber–photon couplings and the difference between them supports the nonlocality degradations resulting from the external environment dissipations.

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Exploring Two‐Exciton Steerability and Nonlocality Dynamics in Two Open Microcavities Coupled by an Optical Fiber

Aldosari,

Hashem

2024

Annalen der Physik

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show abstract

Microwave quantum illumination: enhanced azimuth detection with cavity magnonics

Yang,

Li,

Wang

et al. 2024

Opt. Express

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Most current microwave quantum illumination techniques rely on hybrid quantum systems to detect the presence of targets. However, real-world radar tasks are considerably more intricate than this simplistic model. Accurately determining physical attributes such as object speed, position, and azimuth is also essential. In this study, we explore azimuth detection using a quantum illumination approach based on a cavity-optomagnonics system and analyze the accuracy of azimuth detection in this framework. Our results indicate that this approach significantly outperforms classical microwave radar in azimuth detection within the parameters of current existing experiments. Additionally, we investigate the impact of Kerr nonlinearity of the YIG sphere on azimuth detection accuracy, revealing a clear improvement with the incorporation of Kerr nonlinearity.

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Optomechanical entanglement manipulation and switching in a squeezed-cavity-assisted optomechanical system

Sun,

Qian,

Lai

et al. 2024

Opt. Express

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Quantum entanglement is pivotal in modern quantum technologies, spanning applications from quantum networks to quantum metrology. Controllable quantum entanglement in cavity optomechanical systems has been an enduring pursuit. We propose a unique method for flexible manipulation and switching of optomechanical entanglement in a squeezed-cavity-assisted optomechanical system consisting of a χ(2)-nonlinear optical cavity and an optomechanical cavity. Squeezing the nonlinear optical cavity through parametric pumping allows effective control of light-light and light-vibration interactions within the system. This capability of the squeezed system plays a key role in manipulating quantum entanglement. We find that quantum entanglement between the unsqueezed cavity mode and the mechanical mode can be effectively regulated by adjusting the pump laser parameters. Furthermore, by turning the phase of the pump, we can achieve highly flexible quantum switching between entanglement and separability. Additionally, we demonstrate increased entanglement between the squeezed cavity mode and the mechanical mode when completely suppressing the pump-induced optical input noise. Our findings pave the way not only towards the manipulation and protection of fragile quantum entanglement but also to achieve photon-phonon quantum control by exploiting quantum squeezing.

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Phase-controlled robust quantum entanglement of remote mechanical oscillators

Cited by 3 publications

References 101 publications

Exploring Two‐Exciton Steerability and Nonlocality Dynamics in Two Open Microcavities Coupled by an Optical Fiber

Exploring Two‐Exciton Steerability and Nonlocality Dynamics in Two Open Microcavities Coupled by an Optical Fiber

Microwave quantum illumination: enhanced azimuth detection with cavity magnonics

Optomechanical entanglement manipulation and switching in a squeezed-cavity-assisted optomechanical system

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