# Foundations of Quantum Discord

## TL;DR

This paper provides an overview of quantum discord, explaining its fundamental concepts and relationship to other quantum correlations through an information theoretic perspective and illustrative examples.

## Contribution

It offers a clear, foundational summary of quantum discord, emphasizing its relation to quantum correlations and providing accessible explanations.

## Key findings

- Quantum discord captures non-classical correlations beyond entanglement.
- The paper clarifies the conceptual framework of quantum discord.
- Simple examples illustrate the properties of quantum discord.

## Abstract

This paper summarizes the basics of the notion of quantum discord and how it relates to other types of correlations in quantum physics. We take the fundamental information theoretic approach and illustrate our exposition with a number of simple examples.