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Researchers at the Chinese Academy of Sciences have identified a "magic barrier" in quantum spectra as a diagnostic tool for distinguishing between locally generated versus transported entanglement dynamics. This finding provides a new spectral method to analyze how bipartite entanglement evolves and reshapes itself within many-body systems, offering deeper insight into non-classical information processes beyond simple entropy measurements.

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Chinese Academy of Sciences Maps Entanglement via Magic Barrier

Quantum ZeitgeistJuly 14, 20264 min read

Chinese Academy of Sciences researchers linked quantum entanglement growth to a newly defined “magic barrier” within many-body systems, revealing its relation to entropy.

Researchers at the Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, in collaboration with Shuo Liu from Princeton University, have identified a new way to analyze how bipartite entanglement grows in quantum systems. The team reports demonstrating that the magic barrier, defined as the transient peak of the anti-flatness of the entanglement spectrum, can reveal crucial details about entanglement dynamics, going beyond simply observing…

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