Fig. 4: Experimental transport fidelities F for all 30 OAM MUB states conditional on the specific HDBLSM result of \({|{\psi }_{00}\rangle }_{ab}\).

The labels of 1-30 in the horizontal axis represent the OAM ququint states, \({|{\phi }_{1}\rangle }_{a}-{|{\phi }_{30}\rangle }_{a}\) (Methods). Error bars (standard deviations) are calculated from Poissonian counting statistics of the detection events.