From 0f7730ee7dcd0f224fe429c93d1f9ed0c09a1664 Mon Sep 17 00:00:00 2001
From: Adenilton Silva <7927558+adjs@users.noreply.github.com>
Date: Sat, 4 Mar 2023 20:32:26 -0300
Subject: [PATCH] release notes

---
 .../mcxvchain_dirty_auxiliary-5ea4037557209f6e.yaml    | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 releasenotes/notes/mcxvchain_dirty_auxiliary-5ea4037557209f6e.yaml

diff --git a/releasenotes/notes/mcxvchain_dirty_auxiliary-5ea4037557209f6e.yaml b/releasenotes/notes/mcxvchain_dirty_auxiliary-5ea4037557209f6e.yaml
new file mode 100644
index 000000000000..7a4850370f7f
--- /dev/null
+++ b/releasenotes/notes/mcxvchain_dirty_auxiliary-5ea4037557209f6e.yaml
@@ -0,0 +1,10 @@
+---
+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.