A brief review of our previously introduced forward and backward in time formalism for non-relativistic electron diffraction and its relativistic extension to study photons in time and space is presented. The zero-point energy in the Planck black body spectrum emerges naturally once time-symmetric motion — inherent in Maxwell equations — is invoked for photons. A study of two-slit experiments for slits smaller than the wavelength of the photon unravels novel phenomena due to the spin of the photon. Our proposed experiments are within reach of present technology and could be of interest for modern imaging and quantum optics.

中文翻译：

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零点能量和光子自旋引起的衍射现象

简要回顾了我们之前介绍的非相对论电子衍射的前向和后向时间形式及其在时间和空间中研究光子的相对论扩展。一旦时间对称运动（麦克斯韦方程中固有的）被光子调用，普朗克黑体光谱中的零点能量就会自然出现。对小于光子波长的狭缝的双狭缝实验研究揭示了由于光子自旋而产生的新现象。我们提出的实验在现有技术的范围内，并且可能对现代成像和量子光学感兴趣。