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refraction-ray avatar refraction-ray commented on July 23, 2024

thanks for the report. identified as a bug in qiskit for cu gate: the base gate matrix is not consistent with the gate matrix provided by cu, and this will induce error in the translation.

qc = qiskit.QuantumCircuit(2)
qc.cu(5.868768495722669, 2.24809352294186, 3.59102783505607, 2.0223650288392, 1, 0)
print(qc.data[0][0].to_matrix(), qc.data[0][0].base_gate.to_matrix())

Therefore, CU gate in qiskit may fail tc translation due to this inconsistent bug in qiskit. I am considering to take special care in tc on this case for new releases to avoid the qiskit bug.

from tensorcircuit.

refraction-ray avatar refraction-ray commented on July 23, 2024

fixed in fc2fb06

from tensorcircuit.

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