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相关概念视频

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

946
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
946

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相关实验视频

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Hyperpolarized Xenon for NMR and MRI Applications
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Hyperpolarized Xenon for NMR and MRI Applications

Published on: September 6, 2012

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极化纠的光子对源使用束移位器和薄晶体.

Minjae Hong, Rodrigo Gómez, Valerio Flavio Gili

    Optics letters
    |October 1, 2024
    PubMed
    概括

    我们开发了一种新的极化纠光子对源,使用光束移位器进行量子成像. 这个源实现了高保真度,并违反了贝尔不等式,证明了它对先进量子应用的潜力.

    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
    • 实验物理实验物理学

    背景情况:

    • 纠的光子对是量子信息处理和量子计量学的关键资源.
    • 之前的源代码在忠实性,模式数量或可扩展性方面往往面临限制.

    研究的目的:

    • 为了实验地实现一个新的极化纠的光子对源.
    • 以状态忠实性和贝尔不等式违规性来描述源的表现.
    • 探索其适用于使用薄晶体和多个空间模式的量子成像应用的适用性.

    主要方法:

    • 使用自发性参数向下转换 (SPDC) 在非退化的0型工艺中.
    • 采用光束移位器来产生极化纠.
    • 测量状态忠诚度并违反克劳塞-霍恩-西蒙尼-霍尔特 (CHSH) 不等式.

    主要成果:

    • 实现了F = 0.975 ± 0.004.4的高状态保真度.
    • 证明了CHSH不等式的显著违反,S = 2.75 ± 0.01.
    • 估计该源使用薄晶体产生大约550±12个空间模式的能力.

    结论:

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    • 实现的源提供高质量的极化纠光子.
    • 该源表现出强烈的非经典相关性,证实了量子纠.
    • 该设计与薄晶体和大空间模式数的兼容性使其对量子成像和其他应用具有前景.