Holographic impurities and Kondo effect

TL;DR

This paper develops a holographic model to study magnetic impurities and the Kondo effect, providing insights into the screening length and entanglement properties consistent with theoretical principles.

Contribution

It introduces a novel holographic approach to model magnetic impurities and captures key features of the large-spin Kondo effect.

Findings

Screening length of the Kondo cloud estimated from entanglement entropy

Results are consistent with the g-theorem

Holographic model reproduces main physical properties of the large-spin Kondo effect

Abstract

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.