Accessible quantum discord degrades monotonically with rising Hawking acceleration under the three noise channels without sudden death, while inaccessible discord rises from zero, with symmetric behavior in flip channels.
Luo, Quantum discord for two-qubit systems, Phys
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Local nonfreeness in Hubbard models equals mutual information of natural spin orbitals and is fully classical under number conservation, linking to nonlocal entanglement.
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Quantum discord of mixed states under noisy channels in the curved spacetime
Accessible quantum discord degrades monotonically with rising Hawking acceleration under the three noise channels without sudden death, while inaccessible discord rises from zero, with symmetric behavior in flip channels.
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Local classical correlations between physical electrons in Hubbard systems
Local nonfreeness in Hubbard models equals mutual information of natural spin orbitals and is fully classical under number conservation, linking to nonlocal entanglement.