增强反馈辅助干涉仪的相位灵敏度

IF 2.8 2区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY New Journal of Physics Pub Date : 2024-08-07 DOI:10.1088/1367-2630/ad69b9
Gao-Feng Jiao
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引用次数: 0

摘要

反馈光参量放大器(FOPA)拓扑结构与传统光参量放大器(TOPA)拓扑结构相比具有许多显著优势,如量子关联度更高、全相纠缠增强和损耗鲁棒性强等。在此,我们提出了一种基于 FOPA 拓扑的反馈辅助干涉仪,用于量子计量。我们用同调检测和乘积检测的方法从理论上研究了相位灵敏度。通过调节 FOPA 的反馈强度,相位灵敏度可以进一步提高,并接近量子克拉梅尔-拉奥约束。此外,我们还证明了我们的方案优于基于 TOPA 拓扑的 SU(1,1) 干涉仪。
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Enhanced phase sensitivity in a feedback-assisted interferometer
The topology of feedback optical parametric amplifier (FOPA) renders a number of significant advantages over the topology of traditional optical parametric amplifier (TOPA) such as a higher degree of quantum correlation, all-phase entanglement enhancement, and the robustness of the losses. Here, we propose a feedback-assisted interferometer based on the topology of FOPA for quantum metrology. We theoretically study the phase sensitivity with the method of homodyne detection and product detection. By manipulating the feedback strength of the FOPA, the phase sensitivity can be further enhanced, and approach the quantum Cramér-Rao bound. Furthermore, we demonstrate that our proposal is superior to the SU(1,1) interferometer based on the topology of TOPA.
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来源期刊
New Journal of Physics
New Journal of Physics 物理-物理:综合
CiteScore
6.20
自引率
3.00%
发文量
504
审稿时长
3.1 months
期刊介绍: New Journal of Physics publishes across the whole of physics, encompassing pure, applied, theoretical and experimental research, as well as interdisciplinary topics where physics forms the central theme. All content is permanently free to read and the journal is funded by an article publication charge.
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