Scientists just captured a mysterious quantum “dance” inside superconductors

Unexpected synchronized particle dance observed in superconductor mimic challenges decades-old theory of how electricity flows without resistance. | Contesto: cronaca

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• Scientists just captured a mysterious quantum “dance” inside superconductors

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In a breakthrough experiment that could rewrite the fundamental rules of superconductivity, scientists have for the first time directly imaged particles pairing up inside a system designed to mimic a superconductor. Instead of moving independently, the pairs exhibited a synchronized, dance-like pattern that had never been predicted by existing theory. The discovery, reported by researchers and detailed in a study published this week, suggests a major gap in the classic understanding of how superconductors work at the quantum level. The experiment, conducted at a specialized laboratory facility, allowed scientists to observe the behavior of ultracold atoms arranged in a lattice that simulates the conditions inside a superconducting material. Superconductors are materials that conduct electricity with zero resistance, a property that could revolutionize energy transmission, medical imaging, and quantum computing if it could be achieved at room temperature. For decades, the leading explanation for this phenomenon has been the BCS theory, named after its developers Bardeen, Cooper, and Schrieffer, which describes how electrons form pairs—known as Cooper pairs—and move through a lattice without scattering. What the researchers captured visually, however, was something the BCS theory did not account for: the paired particles did not behave as isolated duos but instead moved in a coordinated, collective rhythm. The team described the motion as a synchronized dance, with each pair adjusting its position and momentum in tandem with its neighbors. This unexpected collective behavior implies that the interactions between pairs are far more complex and interconnected than previously assumed, potentially explaining why some materials superconduct at higher temperatures than the BCS theory predicts. The implications of this finding are significant. If the classic theory is incomplete, it may open new avenues for designing superconductors that operate at more practical temperatures. Current superconductors require extreme cooling to near absolute zero, limiting their widespread use. A more accurate theoretical framework could guide materials scientists in engineering...

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Categoria: cronaca