For the first time, light mimics a Nobel Prize quantum effect

Scientists have pulled off a feat long considered out of reach: getting light to mimic the famous quantum Hall effect. In their experiment, photons drift sideways in perfectly defined, quantized steps-just like electrons do in powerful magnetic fields. Because these steps depend only on natures fundamental constants, they could become a new gold standard for ultra-precise measurements. The discovery also hints at tougher, more reliable quantum photonic technologies.