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A twist on Hanbury Brown—Twiss interferometry offers new approach for remote sensing

In a paper, published in Science Advances today, the researchers demonstrate that for light from a source such as the Sun, random fluctuations of intensity give rise to correlations of  beams. They showed the presence of these correlations by modifying a now classical experiment called Hanbury Brown – Twiss (HBT) interferometry to focus on the angular information contained in light, the “twist” in the light. (link)