🐛 Long-range CNOTs are having problems

[aaronleesander]

Environment information

N/A

Description

Something is wrong with long-range CNOT's, likely based on the generator. It works for nearest-neighbor and other long-range gates like two-qubit rotations seem fine.

Expected behavior

Expected statevector:

[0.70710678+0.j, 0. +0.j, 0. +0.j,
0. +0.j, 0. +0.j, 0.70710678+0.j,
0. +0.j, 0. +0.j]]

Result:
[-5.00000000e-01+1.62588398e-17j -1.22519038e-16+5.00000000e-01j
-0.00000000e+00+0.00000000e+00j -0.00000000e+00+0.00000000e+00j
-9.47634627e-17-5.00000000e-01j -5.00000000e-01-4.40144154e-17j
0.00000000e+00+0.00000000e+00j 0.00000000e+00+0.00000000e+00j]

How to Reproduce

You can recreate this with a long-range Bell state
H [0]
CX [0, 2]