Entanglement Routers Using Macroscopic Singlets

TL;DR

This paper introduces a method to generate and route high entanglement between distant spins by connecting Kondo chains, leveraging the formation of Kondo clouds, with potential applications across various physical systems.

Contribution

It presents a novel entanglement routing mechanism based on connecting Kondo chains, modeled effectively by singlet pairs, and highlights its physical realizability.

Findings

High entanglement achieved between distant spins

Effective modeling with singlet pairs

Potential for implementation in diverse systems

Abstract

We propose a mechanism where high entanglement between very distant boundary spins is generated by suddenly connecting two long Kondo spin chains. We show that this procedure provides an efficient way to route entanglement between multiple distant sites. We observe that the key features of the entanglement dynamics of the composite spin chain are remarkably well described using a simple model of two singlets, each formed by two spins. The proposed entanglement routing mechanism is a footprint of the emergence of a Kondo cloud in a Kondo system and can be engineered and observed in varied physical settings.