Fig. 5
From: Benchmarking engineered exchange interactions on NISQ hardware
Quantum process tomography of the iSWAP gate. (a) The ideal Choi matrix representing the target unitary. (b) The reconstructed process from a noiseless simulation, achieving a fidelity of \(\mathcal {F}{\text {sim}} = 97.32\%\). (c) The experimental implementation on the ibm_perth, yielding a fidelity of \(\mathcal {F}{\text {exp}} = 89.72\%\). The real (Re\((\chi )\)) and imaginary (Im\((\chi )\)) components of the Choi matrix \(\chi\) are shown for each case.
