Wave character of individual molecules revealed

Quantum theory describes the world of atoms very precisely. Still, it defies our macroscopic conception of the everyday world due to its many anti-intuitive predictions. The wave-particle dualism probably is the best known example and means that matter may spread and interfere like waves. Now, scientists have recorded the interference process of individual molecules. "Seeing how the interference pattern develops with every light spot, molecule after molecule, and how a basic principle of quantum mechanics is visualized enhances our understanding of the atomic world," explains one of the researchers.

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