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When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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Electromagnetic (EM) radiation consists of electric and magnetic field components oscillating in planes perpendicular to each other and mutually perpendicular to radiation propagation through space. EM radiation can be classified as a wave, characterized by the properties of waves such as wavelength (denoted as λ) and frequency (represented by ν).
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相关实验视频

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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使用纠的光子而没有公平采样假设的贝尔违规.

Marissa Giustina1, Alexandra Mech, Sven Ramelow

  • 1Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, Boltzmanngasse 3, Vienna 1090, Austria. marissa.giustina@univie.ac.at

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|April 16, 2013
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概括

这个实验证明了使用纠的光子违反贝尔不等式,关闭了公平采样漏洞. 这提供了强有力的证据反对局部现实主义,这是物理学的基本概念.

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科学领域:

  • 量子力学就是量子力学.
  • 物理学的基础 物理学的基础

背景情况:

  • 贝尔不等式测试局部现实主义与量子力学.
  • 之前的实验违反了贝尔不等式,但容易受到漏洞的影响,例如公平采样漏洞.

研究的目的:

  • 试验性地违反贝尔不等式,同时关闭公平采样漏洞.
  • 为了提供进一步的证据反对本地现实主义理论.

主要方法:

  • 使用纠的光子.
  • 采用了贝尔不等式的埃伯哈德形式.
  • 使用改进的源和过渡边缘传感器实现了高光子收集效率.

主要成果:

  • 成功地违反了贝尔不等式.
  • 关闭了公平抽样漏洞,消除了假设样本代表性的需要.
  • 光子现在是第一个在单独的实验中关闭所有主要漏洞的物理系统.

结论:

  • 实验排除了光子的局部现实主义.
  • 证明了量子力学对古典直觉的力量.
  • 促进了对量子纠及其影响的理解.