ArticleNature physics2026
Quantum Fisher information in a strange metal.
Article in Nature physics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Amplified response of cavity-coupled quantum-critical systems.Nature communications · 2026Article
- Quantum Fisher information in a strange metal.Nature physics · 2026Article
- Amplified multipartite entanglement witnessed in a quantum critical metal.Nature communications · 2025Article
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8 authors.
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Abstract
A strange metal is an exotic state of correlated quantum matter, and intensive efforts are ongoing to understand its nature. Here we show that the quantum Fisher information-a concept from quantum metrology-may provide helpful insights. We use inelastic neutron scattering and quantum Monte Carlo simulations to study quantum critical fluctuations of the Kondo destruction type, which are considered to underlie strange metal behaviour in heavy-fermion compounds. We find that the associated quantum Fisher information increases strongly and without a characteristic scale as the strange metal forms with decreasing temperature. This provides evidence for a quantum state with high multipartite entanglement and offers a positive descriptor of strange metallicity that points towards its microscopic basis. Our work opens a direction for future studies across a range of strange metal platforms.
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