Extremal quantum correlations: Experimental study with two-qubit states
Andrea Chiuri, Giuseppe Vallone, Mauro Paternostro, Paolo Mataloni · Physical Review A · 2011
We explore experimentally the space of two-qubit quantum-correlated mixed states, including frontier states as defined by the use of quantum discord and von Neumann entropy. Our experimental setup is flexible enough to allow for high-quality generation of a vast variety of states. We address quantitatively the relation between quantum discord and a recently suggested alternative measure of quantum correlations.