Fig. 2
From: Experimental extractable work-based multipartite separability criteria
Experimental results for two different resource states corresponding to \(\cos \varphi = 0.62\) (a), and \(\cos \varphi = 0.85\) (b) for different strengths of the depolarizing channels μ. Red dots: experimental points for 𝒲 calculated from the experimental count rates measured in 30 s. Magenta dots: experimental points corresponding to the values taken by the Bell parameter, evaluated from the fully reconstructed state tomographies of the resource ρ exp. The value of \(\cos \varphi \) is evaluated by direct inspection of the coincidence rates, averaged over all the experimental states. The error bars take into account the Poissonian statistics of the measured rates and derived from direct error propagation for 𝒲 and Monte Carlo simulation for S. The green and blue dashed curves represent theoretical predictions based on state ρ, while the solid straight lines denote the entanglement thresholds and the Bell function. The dashed vertical lines identify the values of μ for which 𝒲 and S cross their respective bounds
