The quantum Fisher information of collective spin and charge operators detects and certifies entanglement at the non-Fermi-liquid critical point of the two-impurity Kondo model.
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Probing Impurity Quantum Criticality with Entanglement Witnesses
The quantum Fisher information of collective spin and charge operators detects and certifies entanglement at the non-Fermi-liquid critical point of the two-impurity Kondo model.