Shrinking Young’s experiment (a) The classical double-slit experiment using light (slit spacing ~1 mm, propagation distance ~1 m). (b) Schematic of atomic-scale interference in which a pair of neighbouring silicon atomic columns act as a “double slit” for a focused electron probe (spacing 136 pm; crystal thickness ~10 nm; distance to detector ~10 cm). (Courtesy: Koudai Tabata/University of Tokyo)" title="Click to open image in popup" href="https://physicsworld.com/wp-content/uploads/2026/09/08-09-26-atomic-double-slit.jpg"> Shrinking Young’s experiment (a) The classical double-slit experiment using light (slit spacing ~1 mm, propagation distance ~1 m). (b) Schematic of atomic-scale interference in which a pair of neighbouring silicon atomic columns act as a “double slit” for a focused electron probe (spacing 136 pm; crystal thickness ~10 nm; distance to detector ~10 cm).…