Quantum entanglement explains why strange metals are so strange

Physicists at Vienna University of Technology have discovered that quantum entanglement between electrons explains some of the unusual properties of so-called strange metals. Using quantum Fisher information — a measure from quantum information science — researchers analyzed neutron scattering data from a heavy-fermion metal and found evidence of multipartite quantum entanglement involving at least nine particles acting collectively. The strange metal state, which exhibits resistive behavior that traditional physics can't explain, is considered the parent state of high-temperature superconductivity. Per Physics World, the findings, published in Nature Physics, suggest that enhanced multipartite entanglement might be fundamental to strange metals, and could eventually help physicists better understand high-temperature superconductors and other materials where electrons are so strongly correlated they lose their particle nature.

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