English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We disentangle all the individual degrees of freedom in the quantum impurityproblem to deconstruct the Kondo singlet, both in real and energy space, bystudying the contribution of each individual free electron eigenstate. This isa problem of two spins coupled to a bath, where the bath is formed by theremaining conduction electrons. Being a mixed state, we resort to the"concurrence" to quantify entanglement. We identify "projected naturalorbitals" that allow us to individualize a single-particle electronic wavefunction that is responsible of more than $90\%$ of the impurity screening. Inthe weak coupling regime, the impurity is entangled to an electron at the Fermilevel, while in the strong coupling regime, the impurity counterintuitivelyentangles mostly with the high energy electrons and disentangles completelyfrom the low-energy states carving a "hole" around the Fermi level. Thisenables one to use concurrence as a pseudo order parameter to compute thecharacteristic "size" of the Kondo cloud, beyond which electrons are are weaklycorrelated to the impurity and are dominated by the physics of the boundary.

Unveiling the internal entanglement structure of the Kondo singlet