Impurity entanglement entropy in Kondo systems from conformal field theory

Abstract

The entanglement entropy in Kondo impurity systems is studied analytically using conformal field theory. From the impurity contribution to the scaling corrections of the entanglement entropy we extract information about the screening cloud profile for general non-Fermi-liquid fixed points. By also considering the finite-temperature corrections to scaling of the von Neumann entropy we point out a direct connection between the large-distance screening cloud profile and thermodynamic observables such as the specific heat.

4 pages, published version

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• Macroscopic Quantum Entanglement of a Kondo Cloud at Finite Temperature
• Holographic impurities and Kondo effect
• Entanglement in quantum impurity problems is non perturbative
• Universal entanglement crossover of coupled quantum wires
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• Entanglement switching via the Kondo effect in triple quantum dots
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• Entanglement based observables for quantum impurities
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