Extended Data Fig. 7: Post-selected 2-qubit benchmarking.
From: Industry-compatible silicon spin-qubit unit cells exceeding 99% fidelity
Infidelity contribution of Hamiltonian and stochastic error generators of the full gate set XI (a), IX (b), ZI (c), IZ (d), II (e), and CZ (f) comparing the effect of removing gate sequences with Larmor frequency jumps > 50 kHz in post-selection at B0 = 0.666 T using GST. Hamiltonian errors contribute to the infidelity in second order, while stochastic errors contribute in first order. The ZI and IZ gates are implemented virtually and are independent of that post selection within error bars. The original (without post-selection) GST experiment consisted of 12,263 sequences, with Larmor frequency feedback after every 10th sequence, repeated 400 times. 171 repeats passed the post-selection for analysis. Error bars represent the 95% confidence level.
