On the learnability of quantum state fidelity

EPJ Quantum Technology

Table 2 Comparison between ground truth state tomography (optimized and simplified circuits), predicted and baseline state fidelities using our model

Benchmark	Output	GT Optimized Fidelities	GT Simplified Fidelities	Predicted Fidelities	Baseline (ESP) Fidelities
Bernestein–Vazirani 4-bit	“0001”	0.84	0.83	0.85	0.84
Simon 2-bit	“00”	0.78	0.76	0.81	0.86
	“01”	0.84	0.81	0.82	0.90
	“10”	0.83	0.80	0.82	0.89
Superdense coding	“01”	0.89	–	0.89	0.93
	“10”	0.89	–	0.88	0.97
	“11”	0.84	–	0.85	0.93