From 0bfe597468694fd6bd73beade1cf554f6dc65006 Mon Sep 17 00:00:00 2001
From: Antonin Dudermel <antonin.dudermel@ens-lyon.fr>
Date: Thu, 26 Nov 2020 20:52:10 +0100
Subject: [PATCH 1/2] add multigate with classical wire incoming

legacy goes to LogicFan (https://github.com/CQuIC/qcircuit/issues/36)
---
 qcircuit.sty | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/qcircuit.sty b/qcircuit.sty
index 1b93638..483f69b 100644
--- a/qcircuit.sty
+++ b/qcircuit.sty
@@ -138,7 +138,9 @@
     % Inserts half a swap gate.
     % Must be connected to the other swap with \qwx.
 \newcommand{\multigate}[2]{*+<1em,.9em>{\hphantom{#2}} \POS [0,0]="i",[0,0].[#1,0]="e",!C *{#2},"e"+UR;"e"+UL **\dir{-};"e"+DL **\dir{-};"e"+DR **\dir{-};"e"+UR **\dir{-},"i" \qw}
-    % Draws a multiple qubit gate starting at the current position and spanning #1 additional gates below.
+\newcommand{\cmultigate}[2]{*+<1em,.9em>{\hphantom{#2}} \POS [0,0]="i",[0,0].[#1,0]="e",!C *{#2},"e"+UR;"e"+UL **\dir{-};"e"+DL **\dir{-};"e"+DR **\dir{-};"e"+UR **\dir{-},"i" \cw}
+% Same as multigate but with a classical incoming wire
+% Draws a multiple qubit gate starting at the current position and spanning #1 additional gates below.
     % #2 gives the label for the gate.
     % You must use an argument of the same width as #2 in \ghost for the wires to connect properly on the lower lines.
 \newcommand{\ghost}[1]{*+<1em,.9em>{\hphantom{#1}} \qw}

From a0ca8d3fa90de5186fd93cd138f67762655ed05e Mon Sep 17 00:00:00 2001
From: Antonin Dudermel <antonin.dudermel@caramail.fr>
Date: Thu, 4 Nov 2021 19:57:30 +0100
Subject: [PATCH 2/2] add `cmultigate` to the tutorial

---
 Qtutorial.tex | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Qtutorial.tex b/Qtutorial.tex
index 8920fb0..9cde4c7 100644
--- a/Qtutorial.tex
+++ b/Qtutorial.tex
@@ -361,6 +361,21 @@ \subsection{Multiple qubit gates \label{S:multigate}}
 & \qw    &        \ghost{U} & \qw & \qw
 }\end{verbatim}}
 
+Finally, the command \verb=\cmultigate= creates a multigate with a classical first input (for which \verb=\cghost= is not an option).
+
+\[ \Qcircuit @C=1em @R=0em {
+& \cw    & \cmultigate{3}{U} & \cw & \cw \\
+& \qw    &       \ghost{U} & \qw & \qw \\
+& \cdots &       \nghost{U} & \cdots &  \\
+& \qw    &        \ghost{U} & \qw & \qw
+}\]
+{\small \begin{verbatim}\Qcircuit @C=1em @R=0em {
+& \cw    & \cmultigate{3}{U} & \cw & \cw \\
+& \qw    &       \ghost{U} & \qw & \qw \\
+& \cdots &       \nghost{U} & \cdots &  \\
+& \qw    &        \ghost{U} & \qw & \qw
+}\end{verbatim}}
+
 Note that controls to multiple qubit gates work the same as for single
 qubit gates, using \verb=\ctrl= and \verb=\qwx=.
 
@@ -766,6 +781,7 @@ \section{Table of Commands}
                     \char92 targ \\
                     \char92 qswap \\
                     \char92 multigate\{\#1\}\{\#2\} \\
+                    \char92 cmultigate\{\#1\}\{\#2\} \\
                     \char92 sgate\{\#1\}\{\#2\}\\
                     \char92 ghost\{\#1\} \\
                     \char92 cghost\{\#1\} \\