Extended Data Fig. 6. System size scaling of sweep fidelity.

a, Total probability for forming either of the ${\mathbb{Z}}_2$ states following the quasi-adiabatic sweeps presented in Fig. 3, here presented for the final sweep time as a function of system size for full erasure-excision (blue markers), preparation erasure-excision (orange markers), and the baseline (pink markers) data. b, The ratio gain from using full erasure-excision grows as a function of system size, both with respect to the baseline values (pink markers), and to the case of only excising preparation erasures (orange markers). Solid lines are linear guides to the eyes. c, For a fixed detection threshold of 5 photons, the number of erasure errors also increases as a function of system size.