Quantum communication beyond the localization length in disordered spin chains

TL;DR

This paper explores how quantum error correction and parallel spin chains can enable high-fidelity quantum communication over distances exceeding the localization length in disordered spin chains.

Contribution

It introduces methods to surpass the localization length barrier for quantum state transfer using error correction and multiple chains.

Findings

High-fidelity transfer over arbitrary distances achieved

Quantum error correction effective in disordered chains

Parallel chains improve transfer robustness

Abstract

We study the effects of localization on quantum state transfer in spin chains. We show how to use quantum error correction and multiple parallel spin chains to send a qubit with high fidelity over arbitrary distances; in particular distances much greater than the localization length of the chain.