Extended Data Fig. 9: Full local and non-local conductance matrix measurements.

The main text focuses on measurements of local conductances probed through each of the three normal contacts. For such measurements, the non-local responses are recorded in addition, not shown due to size constraints. Here two measurements are highlighted, for the charge configuration shown in Extended Data Fig. 4g. a. Local and non-local conductances when detuning V_QDM, compared to b. numerical simulations of detuning μ_M. Strikingly, the ZBPs do not appear in the non-local measurements, as expected due to arising from MBSs localised on the outer QDs. Additionally, the same patterns of positive and negative non-local conductance in G_ML and G_LM are observed, with the sign inverting at μ = 0. Unlike the simulations, signals appear in G_RM, G_LR, G_RL and G_RM that are not captured by the effective model. We note that a more complete model incorporating explicitly the hybrid regions such as in³⁰ may be needed to fully describe all non-local effects. c. Local and non-local conductances when simultaneously detuning V_QDL, V_QDM and V_QDR, compared to d. numerical simulations of detuning all μ_i.