Fig. 3
From: Uncertainty equality with quantum memory and its experimental verification
Experimental results of verifying the measurement uncertainty with the input states ρAB(α, 1) (a) and ρAB(π/2, x) (b). Red and blue dots represent the measured values of LHS and RHS of Eq. (4), respectively. The experimental data are rescaled by extracting the decoherence effect, shown by filled squares. The original data are shown in Method E. The dark gray curves are theoretical expectations. The bars are plotted from the infidelity of readout process. c Experimental NMR spectra of probe spin (F5) for ρAB(π/4, 1). From bottom to up, the related resulting states after measurement are, respectively, ρAB, ρxB, ρyB, ρzB, ρB, ρB|x, ρB|y, ρB|z. d Measured purities of the resulting states shown in (c). Each purity is obtained from the sum of the integral values of the corresponding peak in (c)
