Optimal dense coding and swap operation between two coupled electronic spins: effects of nuclear field and spin-orbit interaction

TL;DR

This paper investigates how nuclear fields and spin-orbit interactions influence dense coding and swap operations in coupled electronic spins, providing conditions for their validity in AFM and FM couplings.

Contribution

It offers a detailed analysis of the effects of nuclear and spin-orbit interactions on quantum information protocols in coupled spins, identifying conditions for successful dense coding and swap operations.

Findings

Nuclear and spin-orbit interactions significantly affect dense coding and swap operations.

Conditions for valid dense coding are established for different coupling cases.

Feasibility of swap operations is analyzed under various interaction strengths.

Abstract

The effects of nuclear field and spin-orbit interaction on dense coding and swap operation are studied in detail for both the antiferromagnetic (AFM) and ferromagnetic (FM) coupling cases. The conditions for a valid dense coding and under which swap operation is feasible are given.