The local detection method: Dynamical detection of quantum discord with local operations

TL;DR

This paper reviews a local detection method that dynamically reveals and quantifies quantum discord in bipartite systems using only local operations, highlighting recent theoretical and experimental advances.

Contribution

It introduces an accessible overview of the local detection method for quantum discord and reviews recent progress in theory and experiments.

Findings

Demonstrates the effectiveness of local operations in detecting quantum discord

Highlights recent experimental implementations of the method

Provides theoretical insights into the influence of initial correlations

Abstract

Quantum discord in a bipartite system can be dynamically revealed and quantified through purely local operations on one of the two subsystems. To achieve this, the local detection method harnesses the influence of initial correlations on the reduced dynamics of an interacting bipartite system. This article's aim is to provide an accessible introduction to this method and to review recent theoretical and experimental progress.