Tokyo Researchers Diffract a Positronium Beam Through Graphene, Confirming the Antimatter Atom Behaves as a Single Quantum Wave
A Tokyo University of Science team has observed first-order matter-wave diffraction of positronium passing through a few-layer graphene grating, the first direct evidence that the short-lived electron-positron atom behaves as one coherent quantum object and a step toward gravity tests on antimatter.
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