Fig. 5: Hamiltonian-induced deviation of infidelity gradients from linear behavior.
From: Noisy qudit vs multiple qubits: conditions on gate efficiency for enhancing fidelity

Statistical distributions of the relative deviation from the linear behaviour in (14) of the numerically obtained infidelity gradients cd for Ng = 5000 gates for γt ∈ [10−5, 10−3], as a function of the dimension d ∈ ⟦3, 8⟧. The candlestick bar chart should be interpreted as indicated in the upper right, with σ denoting the standard deviation, and the error bars denoting the extremal values. The lower right inset shows the same results for d ∈ ⟦2, 4⟧.