Fig. 6
From: Simultaneous entanglement swapping of multiple orbital angular momentum states of light
Fidelity vs. visibility. Fidelity of the predicted state with the ideal states as a function of HOM visibility for the \(\ell = \pm 1\) subspace. The green point corresponds to the measured fidelity (0.80 ± 0.02); the orange points correspond to the measured four-way HOM visibility of the data in Fig. 5 (0.86 ± 0.04 and 0.70 ± 0.05). The blue line corresponds to the theoretical prediction
