Experimental Exploration of Quantum Correlations: Discord versus Entanglement

TL;DR

This paper experimentally explores quantum correlations, specifically entanglement and discord, in Bell-diagonal states, analyzing their behavior under decoherence to inform future quantum technology applications.

Contribution

It provides an experimental investigation of the geometry of Bell-diagonal states, measuring entanglement and discord, and examines the impact of decoherence in real quantum systems.

Findings

Measured entanglement and discord in Bell-diagonal states

Analyzed the effects of decoherence on quantum correlations

Highlighted the geometry of quantum correlations in experimental setups

Abstract

Quantum correlations represent a fundamental tool for studies ranging from basic science to quantum technologies. Different non-classical correlations have been identified and studied, as entanglement and discord. In view of future applications in this letter we explore experimentally the rich geometry of Bell-diagonal states, measuring the values of entanglement and discord and highlighting the effect of decoherence in real experiments.