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This breakthrough utilizes the quantum anomalous Hall effect to establish a resistance standard based on fundamental constants without requiring external magnetic fields. By eliminating the need for bulky magnets, this method simplifies metrology infrastructure while maintaining precision within a few parts per billion. The advancement strengthens the foundational link between electrical units and nature's unchanging properties, advancing practical quantum applications in measurement science.
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Sursă care acoperăQuantum Zeitgeist
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PTB & Würzburg Explore Quantum Magnet-Free Resistance Standard
Quantum Zeitgeist3 min de cititArticolul și perspectiva sunt în engleză.
Dr. Kajetan Fijalkowski & PTB are pioneering a new electrical resistance standard using the quantum anomalous Hall effect, achieving high accuracy without external magnetic fields.
Dr. Kajetan Fijalkowski received the Helmholtz Prize, worth €20,000, on August 25, 2026, recognizing his team’s achievement in precisely measuring electrical resistance without relying on an external magnetic field, the company says. Building on the work of 1980 Nobel laureate Klaus von Klitzing, researchers from Topological Insulators and the Physikalisch-Technische Bundesanstalt (PTB) demonstrated…
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