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相关概念视频

Time and frequency -Domain Interpretation of PI Control01:27

Time and frequency -Domain Interpretation of PI Control

157
Proportional-Integral (PI) controllers are essential in many control systems to improve stability and performance. They are commonly used in everyday devices like thermostats to enhance system damping and reduce steady-state error. When the zero in the controller's transfer function is optimally placed, the system benefits significantly in terms of stability and accuracy.
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
157

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相关实验视频

Updated: Jul 16, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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量子频率转换使用4端口纤维尾PPLN模块.

Shoichi Murakami, Rintaro Fujimoto, Toshiki Kobayashi

    Optics express
    |September 15, 2023
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    概括
    此摘要是机器生成的。

    这项研究介绍了一种紧的量子频率转换 (QFC) 模块,使用周期极化酸波导. 该模块有效地转移单个光子.

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    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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    相关实验视频

    Last Updated: Jul 16, 2025

    Generation and Coherent Control of Pulsed Quantum Frequency Combs
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    Published on: June 8, 2018

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    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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    科学领域:

    • 量子光学是一种量子光学.
    • 量子信息科学 量子信息科学
    • 光子学 是一个光子学.

    背景情况:

    • 量子频率转换 (QFC) 对量子互连至关重要,特别是在电信光子网络中.
    • 紧的,光纤合的QFC模块对于实际的量子应用是必不可少的.

    研究的目的:

    • 开发和演示一个紧的,光纤合的量子频率转换模块.
    • 为了实现单个光子的高效波长转移,用于量子网络.

    主要方法:

    • 使用基于周期极化酸 (PPLN) 波导的光纤合的4端口频率转换器.
    • 采用自发参数向下转换 (SPDC) 来产生和检测预告单个光子.
    • 测量了交叉相关函数,以验证QFC前后的量子性质.

    主要成果:

    • 成功地将单个光子的波长从780nm转移到1541nm,高保真度.
    • 对于预告光子,实现了 40.45 ± 0.09 的高交叉相关函数.
    • 在QFC后,证明了非经典的交叉相关值为13.7 ± 0.4,保留了量子统计数据.
    • 达到0.73.3的最大设备效率.

    结论:

    • 开发的QFC模块是紧的,纤维封闭的,并且非常高效.
    • 这项技术促进了原子量子系统与光纤通信网络的接口.
    • 保存的量子统计特性对于先进的量子通信协议至关重要.