Transport of Quantum Correlations across a spin chain

TL;DR

This paper reviews recent advances in transporting quantum correlations through spin chains, emphasizing how tuning energy parameters at chain ends enhances transfer efficiency of entanglement and discord.

Contribution

It provides a comprehensive overview of schemes to improve quantum correlation transfer by manipulating energy parameters at the chain ends.

Findings

Manipulating end-bond strengths improves transfer efficiency.

Local magnetic fields can optimize quantum correlation transport.

Both entanglement and discord transfer are effectively enhanced.

Abstract

Some of the recent developments concerning the propagation of quantum correlations across spin channels are reviewed. In particular, we focus on the improvement of the transport efficiency obtained by the manipulation of few energy parameters (either end-bond strengths or local magnetic fields) near the sending and receiving sites. We give a physically insightful description of various such schemes and discuss the transfer of both entanglement and of quantum discord.