Fig. 3: Quantum benchmarking circuits.
From: A manufacturable platform for photonic quantum computing
These circuits are reconfigurable by means of thermal phase shifters indicated in red in the schematics. a–d, Schematics of: quantum state preparation and measurement (a); point-to-point qubit network (b); two-photon quantum (HOM) interference (c); two-qubit fusion measurement (d). e, SPAM fidelity of the reconstructed state with the target state for Pauli eigenstates. f, HOM interference. g, Measured Pauli transfer matrix32 of chip-to-chip qubit interconnect channel. h, Reconstructed two-qubit density matrix after fusion (grey bars indicate magnitude below the 0.01 threshold).
