Entanglement and the Kondo effect in double quantum dots

TL;DR

This paper explores how entanglement in double quantum dots is affected by the interplay of Kondo physics and local interactions, revealing the ground state nature through phase competition.

Contribution

It introduces a detailed analysis of entanglement influenced by both Kondo and capacitive inter-dot interactions in double quantum dot systems.

Findings

Ground state determined by competition between Kondo and singlet phases

Capacitive inter-dot interaction influences entanglement

Phase diagram reveals conditions for entanglement regimes

Abstract

We investigate entanglement between electrons in serially coupled double quantum dots attached to non interacting leads. In addition to local repulsion we consider the influence of capacitive inter-dot interaction. We show how the competition between extended Kondo and local singlet phases determines the ground state and thereby the entanglement.