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Impurity Entanglement Entropy and the Kondo Screening Cloud | | Erik S. Sørensen
; Ming-Shyang Chang
; Nicolas Laflorencie
; Ian Affleck
; | | Date: |
28 Jun 2006 | | Abstract: | The screening of an impurity spin by conduction electrons is associated with the formation of a large Kondo screening cloud, of size xi_K. We study the quantum entanglement between a region of size r surrounding the impurity and the rest of the sample, (of total size R) using Density Matrix Renormalization Group and analytic methods. The corresponding "impurity entanglement entropy", S_{imp}, is shown to be a universal scaling function of r/xi_K and r/R. We calculate this universal function using Fermi liquid theory in the regime xi_K << r. | | Source: | arXiv, cond-mat/0606705 | | Services: | Forum | Review | PDF | Favorites | |
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