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arxiv: 1511.09362 · v1 · pith:KFHUBIE4new · submitted 2015-11-30 · ✦ hep-th · cond-mat.str-el

Holographic impurities and Kondo effect

J. Erdmenger , M. Flory , C. Hoyos , M-N. Newrzella , A. O'Bannon , J. Wu This is my paper
classification ✦ hep-th cond-mat.str-el
keywords kondoeffectholographicimpuritiesimpuritymagneticaroundcalculation
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Magnetic impurities are responsible for many interesting phenomena in condensed matter systems, notably the Kondo effect and quantum phase transitions. Here we present a holographic model of a magnetic impurity that captures the main physical properties of the large-spin Kondo effect. We estimate the screening length of the Kondo cloud that forms around the impurity from a calculation of entanglement entropy and show that our results are consistent with the g-theorem.

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    Holographic models of interface CFTs connect the effective central charge in entanglement entropy to a limiting case of boundary entropy, while adding finite terms for non-crossing intervals to satisfy strong subadditivity.