Long-range interactions and information transfer in spin chains

TL;DR

This paper investigates how long-range interactions affect the transfer of entangled and unentangled states in spin chains, highlighting challenges and considerations for quantum information transfer.

Contribution

It provides an analysis of the impact of errors, especially long-range interactions, on quantum state transfer in spin chains, which is crucial for quantum computing.

Findings

Long-range interactions can significantly disrupt state transfer.

Errors impact entangled and unentangled states differently.

Understanding these effects aids in designing more robust quantum communication protocols.

Abstract

One of the main proposed tools to transfer information in a quantum computational context are spin chains. While spin chains have shown to be convenient and reliable, it has to be expected that, as with any implementation of a physical system, they will be subject to various errors and perturbative factors. In this work we consider the transfer of entangled as well as unentangled states to investigate the effects of various errors, paying particular attention to unwanted long-range interactions.