Contextuality and Quantum Discord

Abstract

One of the defining differences between classical and quantum systems is how measurements affect them. Here, we compare the approaches of contextuality and quantum discord in capturing quantum correlations in special classes of two-qubit states, demonstrating that although non-discordant states are non-contextual, discordant states are not always contextual.

5 pages, 1 figure

References in corpus (3)

• Quantum discord and the power of one qubit
• Experimental quantum computing without entanglement
• Shifting the Quantum-Classical Boundary: Theory and Experiment for Statistically Classical Optical Fields