Impurity entanglement entropy in Kondo systems from conformal field theory

Details Impurity entanglement entropy in Kondo systems from conformal field theory Impurity entanglement entropy in Kondo systems from conformal field theory

2011-02-12

arxiv.org/abs/1102.2492v3

Phys. Rev. B 84, 041107(R) (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, published version

Scientific paper

10.1103/PhysRevB.84.041107

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.

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