qiskit/releasenotes/notes/1.2/mcxvchain_dirty_auxiliary-5...

11 lines
432 B
YAML

---
features:
- |
:class:`.MCXVChain` has two new Boolean parameters `relative_phase` and `action_only`.
If `action_only` the circuit does not clean the dirty qubits. If `relative_phase`
the gate is implemented up to a global phase. Both parameters are used to optimize the
decomposition of MCXVChain.
fixes:
- |
:class:`.MCXVChain` with k controls and k-2 dirty auxiliary qubits now requires 8k-6 cx gates.