Bypassing state initialisation in perfect state transfer protocols on spin-chains

TL;DR

This paper demonstrates perfect quantum state transfer in spin chains without initialising the entire system, relying solely on correlations between the end spins, which simplifies implementation for quantum information protocols.

Contribution

It introduces a method to achieve perfect state transfer without full system initialisation by exploiting correlations between the chain's end spins.

Findings

Perfect state transfer achieved without initialising the entire chain

Correlations between end spins enable reliable quantum communication

Simplifies quantum information transfer protocols

Abstract

Although a complete picture of the full evolution of complex quantum systems would certainly be the most desirable goal, for particular Quantum Information Processing schemes such an analysis is not necessary. When quantum correlations between only specific elements of a many-body system are required for the performance of a protocol, a more distinguished and specialised investigation is helpful. Here, we provide a striking example with the achievement of perfect state transfer in a spin chain without state initialisation, whose realisation has been shown to be possible in virtue of the correlations set between the first and last spin of the transmission-chain.