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Hokkaido University Team Models Many-Body Quantum Hall Phase Diagram For Fermion Systems

The celebrated Hofstadter butterfly diagram, long a theoretical ideal, now directly links to measurable electrical currents in real materials. Previously, understanding how electron interactions altered this map of quantum behaviour remained a challenge, but this work establishes a clear connection between the butterfly’s ‘colours’ and the proportionality constant in Ohm’s law. This allows prediction of Hall conductivity even when electrons inte…
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quantumzeitgeist.com broke the news on Thursday, July 16, 2026.
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