bug in dealing with data type at one_qubit_decompose.py #9827
Description
Environment
- Qiskit Terra version:
{'qiskit-terra': '0.23.0', 'qiskit-aer': '0.11.2', 'qiskit-ignis': '0.7.0', 'qiskit-ibmq-provider': '0.19.2', 'qiskit': '0.40.0', 'qiskit-nature': None, 'qiskit-finance': None, 'qiskit-optimization': None, 'qiskit-machine-learning': None} - Python version:
python3.8 - Operating system: linux
What is happening?
I see error message as below:
"/home/labuser/.virtualenvs/controller/lib/python3.8/site-packages/qiskit/quantum_info/synthesis/one_qubit_decompose.py", line 242, in angles_and_phase
return self._params(unitary)
File "/home/labuser/.virtualenvs/controller/lib/python3.8/site-packages/qiskit/quantum_info/synthesis/one_qubit_decompose.py", line 265, in _params_u1x
theta, phi, lam, phase = OneQubitEulerDecomposer._params_zyz(mat)
TypeError: argument 'unitary': type mismatch:
from=float64, to=complex128
this was with input
[[ 0.70710678 0.70710678]
[ 0.70710678 -0.70710678]]
How can we reproduce the issue?
from qiskit.quantum_info import OneQubitEulerDecomposer
rzsxDecomposer = OneQubitEulerDecomposer('PSX')
M=[[ 0.70710678, 0.70710678] , [ 0.70710678, -0.70710678]]
(theta, phi, lam, gamma) = rzsxDecomposer.angles_and_phase(M)
The error can be resolved by manually casting M to complex;
from qiskit.quantum_info import OneQubitEulerDecomposer
rzsxDecomposer = OneQubitEulerDecomposer('PSX')
M=[[ 0.70710678, 0.70710678] , [ 0.70710678, -0.70710678]]
(theta, phi, lam, gamma) = rzsxDecomposer.angles_and_phase(np.array(M).astype(complex))
What should happen?
flag the data type error
Any suggestions?
add wrapper before pass it to rust so that every variable we are passing is casted to complex