Figure 3
From: Optimal estimation of entanglement and discord in two-qubit states
Results for Negativity and Concurrence (blue), Log-Negativity (red), and Quantum Geometric Discord (green) non-optimal (left side) and optimal (right side) estimators, with respect to p (see Eq. 1). Experimental points are compared with: theoretical value of the quantity to estimate (dashed line), theoretical uncertainty for the non-optimal estimator (dotted curve) and theoretical uncertainty related to the quantum Cramér-Rao bound (solid curve).
