Fig. 1: Schematic of the pairwise perturbative ansatz. | Nature Communications

Fig. 1: Schematic of the pairwise perturbative ansatz.

From: Bootstrapping quantum process tomography via a perturbative ansatz

Fig. 1

a Pairwise perturbative ansatz (PAPA) tomography: for all qubit pairs, characterize the effective two-qubit process (Choi state \({\sigma }_{{\mathcal{S}}}\)) when the unknown N-qubit process \({\mathcal{E}}\) occurs, and all other qubits start in the maximally mixed state. b Three-qubit PAPA+GST: characterized two-qubit gate sets are bootstrapped to a three-qubit gate set via PAPA.

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