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

References in corpus (5)

• Matrix Product States, Projected Entangled Pair States, and variational renormalization group methods for quantum spin systems
• Quantum Noise as an Entanglement Meter
• Valence Bond Entanglement Entropy
• Impurity Entanglement Entropy and the Kondo Screening Cloud
• Corrections to scaling in entanglement entropy from boundary perturbations