UnitaryGate.control implementation high gate count #10313
Description
What should we add?
It seems UnitaryGate.control is producing higher gate counts than is necessary. The implementation is currently using Isometry for the definition but should probably switch to qs_decomposition. Using qs_decomposition may also help with resolve issue #10311.
| nqubits | Isometry | QSD | |
|---|---|---|---|
| N(u) | 4 | 224 | 163 |
| N(cx) | 4 | 192 | 100 |
| N(u) | 5 | 697 | 1017 |
| N(cx) | 5 | 928 | 444 |
| N(u) | 6 | 4381 | 2886 |
| N(cx) | 6 | 4147 | 1868 |