Quantum Wire as Open System

TL;DR

This paper explores quantum wire systems for transferring quantum information, focusing on how thermalization affects the fidelity of different encoding schemes during state transfer.

Contribution

It analyzes the impact of thermalization on quantum state transfer in spin chains and compares encoding schemes for improved fidelity under thermal conditions.

Findings

Certain encoding schemes are more robust against thermalization.

Thermal effects significantly influence transfer fidelity.

Optimal encoding depends on temperature and system parameters.

Abstract

The faithful exchange of quantum information will soon become one of the challenges of the emerging quantum information technology. One of the possible solutions is to transfer a superposition through a chain of properly coupled spins. Such a system is called a quantum wire. We discuss the transfer in a quantum wire \cite{christ,niko1,niko2}, when the process of thermalization of the state takes place together with the free evolution. We investigate which encoding scheme is more faithful in certain thermal conditions.