User is not warned about implicit permutations

[oneTimePad]

There appears to be no warning to alert the user that there could be implicit permutations when converting a circuit from pytket to qiskit. Specifically, the user does not know that they need to pass the keyword arg replace_implicit_swaps.

import numpy as np
from pytket import Circuit
from pytket.extensions.qiskit import AerStateBackend, tk_to_qiskit
from qiskit_aer import StatevectorSimulator

b = AerStateBackend()
c = Circuit(3).X(0).SWAP(0, 1).SWAP(0, 2)

c = AerStateBackend().get_compiled_circuit(c, optimisation_level=2)

sv1 = b.run_circuit(c).get_state()

print(sv1.round(4))

qiskit_circ = tk_to_qiskit(c)
print(np.array(StatevectorSimulator().run(qiskit_circ).result().get_statevector()).round(4))

Output:

[0.+0.j 0.+0.j 1.+0.j 0.+0.j 0.+0.j 0.+0.j 0.+0.j 0.+0.j]
[0.+0.j 1.+0.j 0.+0.j 0.+0.j 0.+0.j 0.+0.j 0.+0.j 0.+0.j]

[cqc-melf]

Thank you for reporting, we will take a look!