Fig. 3 | Nature Communications

Fig. 3

From: Simultaneous entanglement swapping of multiple orbital angular momentum states of light

Fig. 3

High-dimensional state. Estimated density matrix of the joint state of A and D for the four-dimensional space with \(\ell = \pm 1, \pm 2\). a The state estimated using the reconstructed density matrices of all six two-dimensional subspaces in Eq. (3). b The theoretical prediction using the experimentally observed spiral bandwidth. Positive values are shown in blue, while negative values are shown in red; grey indicates the element is unmeasured in a or zero in b

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