Scientists catch antimatter “atom” acting like a wave for the first time

For the first time, researchers observe wave-like interference in positronium, confirming quantum behavior in antimatter and opening new paths to study gravity's effect on it. | Contesto: cronaca

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• Scientists catch antimatter “atom” acting like a wave for the first time

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In a landmark experiment that pushes the boundaries of quantum mechanics, scientists have for the first time observed an antimatter “atom” behaving like a wave, confirming a strange prediction of quantum physics that has never before been demonstrated with such exotic matter. The achievement, reported by researchers working with positronium—an unstable, short-lived atom composed of an electron and its antimatter counterpart, a positron—shows that even antimatter particles can exhibit wave-like interference, a hallmark of quantum behavior previously seen only in ordinary matter. The experiment, conducted by an international team of physicists, involved creating positronium atoms and passing them through a series of narrow slits, similar to the classic double-slit experiment that first revealed the wave-particle duality of light and electrons. The researchers detected clear interference patterns in the distribution of the positronium, indicating that the atoms were behaving as waves, spreading out and overlapping with themselves. This result, published in a peer-reviewed journal, marks the first time such wave-like behavior has been directly observed in an antimatter system, extending the weirdness of quantum mechanics to the realm of antimatter. The significance of this breakthrough extends beyond confirming a fundamental tenet of quantum theory. Positronium, being composed of both matter and antimatter, offers a unique laboratory for studying the subtle differences between the two. The ability to manipulate and observe its quantum behavior could lead to new experiments exploring how antimatter interacts with gravity—a question that has puzzled physicists for decades. Unlike ordinary matter, antimatter’s gravitational behavior has never been directly measured, and some theories suggest it might fall differently, potentially upending our understanding of the universe. “This is a major step forward,” said one of the lead researchers, speaking on condition of anonymity due to the ongoing nature of the work. “We have shown that positronium can be treated as a quantum wave, and that opens up a whole new set of experiments we couldn’t do before.” The team now plans to...

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Categoria: cronaca