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+%This is the quantikz library for typesetting quantum circuits using LaTeX/Tikz. version 0.9.4
+% Written by Alastair Kay, 2018. Published under a CC-BY-4.0 licence
+% Please email me (alastair.kay@rhul.ac.uk) with any bug reports or feature requests.
+% If you find this library useful, please cite its usage in your work, using arXiv:1809.03842, and possibly the DOI: 10.17637/rh.7000520.
+% Usage is at your own risk.
+
+%version 0.9.5:
+% fixed bug which meant multi-wire gates didn't work outside of an environment such as center.
+%version 0.9.4:
+% added nwires and cwires options to gate command to simulate qcircuit's nphantom and cphantom
+% vertical text options for slice labels.
+% replaced macro for measuring width and height for greater reliability. disable auto spacing now unnecessary as things like \sqrt{} work in the gate label.
+% investigated possibility of high labels (multi-line labels, particularly for a multi-qubit gate). key disable auto height introduced.
+% now provides a quantikz environment, which is theoretically compatible with tikz' external library (entirely untested). Can still use tikzcd environment otherwise.
+% removed a tikzcd customisation fixing the baseline for one row circuits as this was messing with any manual attempts to adjust the baseline.
+%version 0.9.3:
+% adjusted spacing of gate operation between in-circuit and overlay so that transparency looks better
+% Other gate spacing adjustments. multi-qubit gates in particular should look better. 'disable auto spacing' can switch this off, particularly for use with things like \sqrt{} in the multi-qubit gate label, which will throw a weird error.
+% gate command now takes two further optional parameters: minimum width and minimum height for each cell.
+% some consolidation of styling commands
+% global keys 'transparent' and 'thin lines' added. 'thin lines' gives a look more similar to the original QCircuit.
+%version 0.9.2:
+% made 'wires' the default key, so [wires=2] now becomes [2]
+% added 'slice title', 'slices style', 'slices label style' key to control titles of slices under 'slice all'
+% better access to positioning of gategroup label.
+% now arXiv compatible (that was a challenge! they use old versions of packages)
+%Previous versions:
+%version 0.9.1:
+% added \cwbend gate for cornering classical wires.
+% made size of strike through for multiqubit gates stylable via the keys /quantikz/Strike Height/ and /quantikz/Strike Width/
+% added new \gate[swap] variant of swap (nearest-neighbour only).
+%version 0.9.0:
+%original release.
+
+\ProvidesPackage{quantikz}[2019/04/24 typeset quantum circuit diagrams]
+
+% Package(s) to include
+\RequirePackage{xargs,ifthen,xstring,xparse,etoolbox,mathtools}
+\RequirePackage{environ} %in an attempt to help with compatibility with the external library of tikz.
+\RequirePackage{tikz}
+\usetikzlibrary{cd,decorations.pathreplacing,calc,positioning,fit,shapes.symbols,decorations.pathmorphing,shapes.misc,backgrounds,decorations.markings}
+
+\newlength{\myl}
+\newlength{\myh}
+\newlength{\myd}
+
+%\makeatletter
+\newcounter{aaa}
+\tikzset{
+ apply/.style args={#1 except on segments #2}{postaction={
+ /utils/exec={
+ \@for\mattempa:=#2\do{\csdef{aaa@\mattempa}{}}
+ \setcounter{aaa}{0}
+ },
+ decorate,decoration={show path construction,
+ moveto code={},
+ lineto code={
+ \stepcounter{aaa}
+ \ifcsdef{aaa@\theaaa}{}{
+ \path[#1] (\tikzinputsegmentfirst) -- (\tikzinputsegmentlast);
+ }
+ },
+ curveto code={
+ \stepcounter{aaa}
+ \ifcsdef{aaa@\theaaa}{}{
+ \path [#1] (\tikzinputsegmentfirst) .. controls
+ (\tikzinputsegmentsupporta) and (\tikzinputsegmentsupportb)
+ ..(\tikzinputsegmentlast);
+ }
+ },
+ closepath code={
+ \stepcounter{aaa}
+ \ifcsdef{aaa@\theaaa}{}{
+ \path [#1] (\tikzinputsegmentfirst) -- (\tikzinputsegmentlast);
+ }
+ },
+ },
+ },
+ },
+}
+%test if item is in list of item. Probably better ways to do this, but I could get this version to work.
+\newcommand*{\IfInList}[2]{%
+ \gdef\memory{0}
+ \edef\arg{#1}
+ \foreach \q in #2 {%
+ \ifthenelse{\q=\arg}{%
+ \gdef\memory{1}
+ }{}
+ }
+ \ifthenelse{\memory=1} {%
+ \expandafter\@firstoftwo
+ }{%
+ \expandafter\@secondoftwo
+ }
+}
+%define the quantikz environment. I need this to facilitate the external library
+\NewEnviron{quantikz}[1][]{%
+ \def\@temp{\tikzcd@[#1]\BODY}%
+ \expandafter\@temp\endtikzcd
+}
+\def\temp{&} \catcode`&=\active \let&=\temp
+%
+%commands for putting in text vertically
+\protected\def\vvv#1{\leavevmode\bgroup\vbox\bgroup\xvvv#1\relax}
+%
+\def\xvvv{\afterassignment\xxvvv\let\tmp= }
+%
+\def\xxvvv{%
+% \ifx\tmp\@sptoken\egroup\ \vbox\bgroup\let\next\xvvv
+% \else
+\ifx\tmp\relax\egroup\egroup\let\next\relax
+ \else
+\hbox to 1.1em{\hfill\tmp\hfill}% centred
+\let\next\xvvv\fi%\fi
+\next}
+%end of commands for putting text vertically
+%
+\long\def\ifnodedefined#1#2#3{%
+ \@ifundefined{pgf@sh@ns@#1}{#3}{#2}%
+}
+%I don't think this is used any more
+% \newcommand\getwidth[1]{
+% \pgfkeys{minimum width=0pt}%
+% \pgfkeys{/quantikz,#1}
+% \pgfkeysgetvalue{/quantikz/minimum width}{\minwidth}
+% \minwidth
+% }
+
+%the main gate command
+\DeclareExpandableDocumentCommand{\gate}{O{}O{1.5pt}O{1.5pt}m}{%optional parameter contains styling info. compulsory is gate text.
+ |[inner sep=4pt,minimum width=#2,minimum height=#3]|%
+ \edef\n{\the\pgfmatrixcurrentrow} %the row
+ \edef\m{\the\pgfmatrixcurrentcolumn} %the column
+ %reset macros that are going to be set by the options
+ \edef\options{row=\n,col=\m,#1}
+ \def\toswap{0}%
+ \def\DisableMinSize{0}%
+ \pgfkeys{/quantikz,wires=1,style=,label style=,braces=}%
+ %import options passed as parameters
+ \pgfkeys{/quantikz,#1}%
+ \pgfkeysgetvalue{/quantikz/wires}{\quantwires}
+ \pgfkeysgetvalue{/quantikz/style}{\a}
+ \pgfkeysgetvalue{/quantikz/label style}{\b}
+ \pgfkeysgetvalue{/quantikz/cwires}{\mylist}
+ \pgfkeysgetvalue{/quantikz/nwires}{\nowires}
+ \ifthenelse{\toswap=1}{%if it's a swap gate...
+ \def\quantwires{2}
+ \phantom{wide}
+ \settowidth{\myl}{$wide$}
+ \settoheight{\myh}{$wide$}
+ \settodepth{\myd}{$wide$}
+ }{%not a swap gate
+ \settowidth{\myl}{$#4$}
+ \ifthenelse{\DisableMinSize=1}{%disable automatic size detection. Use $U$ instead.
+ \phantom{U}
+ \settoheight{\myh}{$U$}
+ \settodepth{\myd}{$U$}
+ }{%automatically get width and height of label
+ \phantom{#4}
+ \settoheight{\myh}{$#4$}
+ \settodepth{\myd}{$#4$}
+ }
+ }
+%
+ \IfInList{1}{\mylist}{\cw}{\IfInList{1}{\nowires}{}{\qw}}%do we need classical, no wire, or quantum wire?
+ \edef\k{\the\numexpr\n+\quantwires-1\relax}
+ \edef\mn{\the\numexpr\m-1\relax}
+ \ifthenelse{\quantwires=1}{}{%more than 1 wire on gate. iterate through each wire
+ \foreach \i in {\the\numexpr\n+1\relax,...,\k} {
+ \edef\newcom{\noexpand\vcwhexplicit{\i-\m}{\i-\mn}}
+ \edef\newcomb{\noexpand\vqwexplicit{\i-\m}{\i-\mn}}
+ \edef\val{\the\numexpr\i+1-\n\relax}
+ \IfInList{\val}{\mylist}{\newcom}{\IfInList{\val}{\nowires}{}{\newcomb}}%do we need classical, no wire, or quantum wire?
+ %apply auto width to the cell, and make sure we unset the setting so that it doesn't apply to later circuits.
+ \globaldefs=1
+ \edef\dotikzset{\noexpand\tikzset{row \i\space column \m/.append style={minimum width={max(\the\myl+8pt,#2)}}}}
+ \dotikzset
+ \edef\undotikzset{\noexpand\tikzset{row \i\space column \m/.style={}}}
+ \expandafter\pgfutil@g@addto@macro\expandafter\tikzcd@atendglobals\expandafter{\undotikzset}
+ }
+ %apply auto height to last row only. unsetting already handled above.
+ \globaldefs=1
+ \edef\dotikzset{\noexpand\tikzset{row \k\space column \m/.append style={minimum height={max(\the\myh+\the\myd+8pt,#3)}}}}
+ \dotikzset
+%
+ }
+ %call deferred gate command.
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\pgfutil@g@addto@macro\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\tikzcd@atendsavedpaths\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{%
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\gate@end\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter\a\expandafter\expandafter\expandafter}\expandafter\expandafter\expandafter{\expandafter\b\expandafter}\expandafter{\options}{#4}
+ }
+}
+
+%deferred gate command. draws a box around all included cells. this is not part of the matrix, but comes afterwards.
+\newcommand{\gate@end}[4]{
+ \pgfkeys{/quantikz,wires=1}
+ \def\toswap{0}
+ \def\DisableMinSize{0}
+ \pgfkeys{/quantikz,#3}%
+ \pgfkeysgetvalue{/quantikz/wires}{\quantwires}
+ \pgfkeysgetvalue{/quantikz/row}{\row}
+ \pgfkeysgetvalue{/quantikz/col}{\col}
+ \ifthenelse{\toswap=1}{\def\quantwires{2}}{}
+ \xdef\LoopGG{}
+ \foreach \n in {\row,...,\the\numexpr\row+\quantwires-1\relax} {
+ \ifnodedefined{\tikzcdmatrixname-\n-\col}{
+ \xdef\LoopGG{\LoopGG(\tikzcdmatrixname-\n-\col)}
+ }{}
+ }
+ \ifthenelse{\toswap=1}{
+ \node (group\tikzcdmatrixname-\row-\col) [fit=\LoopGG,operator,inner sep=0pt,#1] {\hphantom{Wide}};
+ \draw [thickness] (group\tikzcdmatrixname-\row-\col.west|-\tikzcdmatrixname-\row-\col.center) to[out=0,in=180] (group\tikzcdmatrixname-\row-\col.east|-\tikzcdmatrixname-\the\numexpr\row+1\relax-\col.center);
+ \draw [line width=3pt,white,shorten >=0.9pt,shorten <=0.9pt] (group\tikzcdmatrixname-\row-\col.east|-\tikzcdmatrixname-\row-\col.center) to[out=180,in=0] (group\tikzcdmatrixname-\row-\col.west|-\tikzcdmatrixname-\the\numexpr\row+1\relax-\col.center);
+ \draw [thickness] (group\tikzcdmatrixname-\row-\col.east|-\tikzcdmatrixname-\row-\col.center) to[out=180,in=0] (group\tikzcdmatrixname-\row-\col.west|-\tikzcdmatrixname-\the\numexpr\row+1\relax-\col.center);
+ }{
+ \node (group\tikzcdmatrixname-\row-\col) [fit=\LoopGG,operator,inner sep=0pt,label={[gg label,#2]$#4$},#1] {\hphantom{$#4$}};
+ }
+}
+
+%ghost will get height correct if can't be automatically assigned.
+\DeclareExpandableDocumentCommand{\ghost}{O{}O{0pt}O{1.5pt}m}{%optional parameter contains styling info. compulsory is gate text.
+ |[inner ysep=4pt,minimum width=#2,minimum height=#3]| \vphantom{#4}
+}
+
+
+%single slice
+\newcommand\slice[2][]{%
+ %\edef\currcol{\the\pgfmatrixcurrentcolumn}
+ \pgfkeys{/quantikz,wires=1,style=,label style=,braces=}
+ \pgfkeys{/quantikz,#1}%
+ \edef\options{\pgfkeysvalueof{/quantikz/style}}
+ \edef\opts{\pgfkeysvalueof{/quantikz/label style}}
+ \edef\n{\the\pgfmatrixcurrentcolumn}
+ %\expandafter\show\n
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\pgfutil@g@addto@macro\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\tikzcd@atendslices\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{%
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\slice@end\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter\n\expandafter\expandafter\expandafter}\expandafter\expandafter\expandafter{\expandafter\options\expandafter}\expandafter{\opts}{#2}%
+ }}
+%deferred slice command
+\newcommand{\slice@end}[4]{
+ \edef\top{($1/2*(\tikzcdmatrixname-col#1.east |- \tikzcdmatrixname-row1.north)+1/2*(\tikzcdmatrixname-col\the\numexpr#1+1\relax.west |- \tikzcdmatrixname-row1.north)$)}
+ \edef\bottom{($1/2*(\tikzcdmatrixname-col#1.east |- \tikzcdmatrixname-row\the\pgfmatrixcurrentrow.south)+1/2*(\tikzcdmatrixname-col\the\numexpr#1+1\relax.west |- \tikzcdmatrixname-row\the\pgfmatrixcurrentrow.south)+(0,-3pt)$)}
+ \expandafter\expandafter\expandafter\make@slice\expandafter\expandafter\expandafter{\expandafter\top\expandafter}\expandafter{\bottom}{#4}{#2}{#3}
+}
+\newcommand{\make@slice}[5]{
+ \draw[slice,#4] #1 to node[pos=0,inner sep=4pt,anchor=south,color=black,#5] {#3} #2;
+}
+%deferred command which will slice everything
+\newcommand{\sliceallr}{
+ \edef\sstyle{\pgfkeysvalueof{/tikz/slice style}}
+ \edef\slstyle{\pgfkeysvalueof{/tikz/slice label style}}
+ \foreach \n in {2,...,\the\numexpr\pgfmatrixcurrentcolumn-1-\pgfkeysvalueof{/tikz/remove end slices}\relax} {
+ \edef\col{\the\numexpr\n-1\relax}
+ \edef\title{\pgfkeysvalueof{/tikz/slice titles}}
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\slice@end\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter\n\expandafter\expandafter\expandafter}\expandafter\expandafter\expandafter{\expandafter\sstyle\expandafter}\expandafter{\slstyle}{\title}
+ }
+}
+%deferred slice command with vertical text
+\newcommand{\sliceallvr}{
+ \edef\sstyle{\pgfkeysvalueof{/tikz/slice style}}
+ \edef\slstyle{\pgfkeysvalueof{/tikz/slice label style}}
+ \foreach \n in {2,...,\the\numexpr\pgfmatrixcurrentcolumn-1-\pgfkeysvalueof{/tikz/remove end slices}\relax} {
+ \edef\col{\the\numexpr\n-1\relax}
+ \edef\title{\vvv{\pgfkeysvalueof{/tikz/slice titles}}}
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\slice@end\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter\n\expandafter\expandafter\expandafter}\expandafter\expandafter\expandafter{\expandafter\sstyle\expandafter}\expandafter{\slstyle}{\title}
+ }
+}
+
+%labelling of inputs
+\newcommand\lstick[2][]{%
+ \pgfkeys{/quantikz,wires=1,style=,label style=,braces=}
+ \pgfkeys{/quantikz,#1}%
+ \edef\newoptions{row=\the\pgfmatrixcurrentrow,col=\the\pgfmatrixcurrentcolumn,#1}
+ \pgfkeysgetvalue{/quantikz/label style}{\options}
+ \pgfkeysgetvalue{/quantikz/braces}{\opts}
+ %\edef\n{\the\pgfmatrixcurrentrow}
+ %\edef\m{\the\pgfmatrixcurrentcolumn}
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\pgfutil@g@addto@macro\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\tikzcd@atendsavedpaths\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{%
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\groupinput@end\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter\newoptions\expandafter\expandafter\expandafter}\expandafter\expandafter\expandafter{\expandafter\options\expandafter}\expandafter{\opts}{#2}%
+ }
+}
+%labelling of outputs
+\newcommand\rstick[2][]{%
+ \pgfkeys{/quantikz,wires=1,style=,label style=,braces=}
+ \pgfkeys{/quantikz,#1}%
+ \edef\newoptions{row=\the\pgfmatrixcurrentrow,col=\the\pgfmatrixcurrentcolumn,#1}
+ \pgfkeysgetvalue{/quantikz/label style}{\options}
+ \pgfkeysgetvalue{/quantikz/braces}{\opts}
+ %\edef\n{\the\pgfmatrixcurrentrow}
+ %\edef\m{\the\pgfmatrixcurrentcolumn}
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\pgfutil@g@addto@macro\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\tikzcd@atendsavedpaths\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{%
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\groupoutput@end\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter\newoptions\expandafter\expandafter\expandafter}\expandafter\expandafter\expandafter{\expandafter\options\expandafter}\expandafter{\opts}{#2}%
+ }
+}
+%deferred labelling of inputs
+\newcommand{\groupinput@end}[4]{%basic data as keys, lable options, brace options, text
+ \pgfkeys{/quantikz,wires=1}
+ \pgfkeys{/quantikz,#1}%
+ \pgfkeysgetvalue{/quantikz/wires}{\quantwires}
+ \pgfkeysgetvalue{/quantikz/row}{\row}
+ \pgfkeysgetvalue{/quantikz/col}{\col}
+ \xdef\LoopGI{}
+ \foreach \n in {\row,...,\the\numexpr\row+\quantwires-1\relax} {
+ \ifnodedefined{\tikzcdmatrixname-\n-\col}{
+ \xdef\LoopGI{\LoopGI(\tikzcdmatrixname-\n-\col)}
+ }{}
+ }
+ \ifthenelse{\quantwires=1} {
+ \node (ingr-\row) [fit=\LoopGI, inner sep=0pt,label={[align=center,#2]left:#4}] {};
+ }{
+ \node (ingr-\row) [fit=\LoopGI, inner sep=0pt] {};
+ \draw[dm,#3] ($(ingr-\row.north west)+(-0.1cm,0.1cm)$) to node[midway,align=center,anchor=east,xshift=-0.1cm,#2] {#4} ($(ingr-\row.south west)+(-0.1cm,-0.1cm)$);
+ }
+} %
+%deferred labelling of outputs
+\newcommand{\groupoutput@end}[4]{%basic data as keys, lable options, brace options, text
+ \pgfkeys{/quantikz,wires=1}
+ \pgfkeys{/quantikz,#1}%
+ \pgfkeysgetvalue{/quantikz/wires}{\quantwires}
+ \pgfkeysgetvalue{/quantikz/row}{\row}
+ \pgfkeysgetvalue{/quantikz/col}{\col}
+ \xdef\LoopGO{}
+ \foreach \n in {\row,...,\the\numexpr\row+\quantwires-1\relax} {
+ \ifnodedefined{\tikzcdmatrixname-\n-\col}{
+ \xdef\LoopGO{\LoopGO(\tikzcdmatrixname-\n-\col)}
+ }}
+ \ifthenelse{\quantwires=1} {
+ \node (outgr-\row) [fit=\LoopGO, inner sep=0pt,label={[align=center,#2]right:#4}] {};
+ }{
+ \node (outgr-\row) [fit=\LoopGO, inner sep=0pt] {};
+ \draw[dd,#3] ($(outgr-\row.north east)+(0.1cm,0.1cm)$) to node[midway,align=center,anchor=west,xshift=0.1cm,#2] {#4} ($(outgr-\row.south east)+(0.1cm,-0.1cm)$);
+ }
+} %
+%inputs and outputs within a multi-wire gate
+\newcommand\gateinput[2][]{%
+ \pgfkeys{/quantikz,wires=1,style=,label style=,braces=}%
+ \pgfkeys{/quantikz,#1}%
+ \edef\newoptions{row=\the\pgfmatrixcurrentrow,col=\the\pgfmatrixcurrentcolumn,#1}
+ \pgfkeysgetvalue{/quantikz/label style}{\options}
+ \pgfkeysgetvalue{/quantikz/braces}{\opts}%
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\pgfutil@g@addto@macro\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\tikzcd@atendlabels\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{%
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\mginput@end\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter\newoptions\expandafter\expandafter\expandafter}\expandafter\expandafter\expandafter{\expandafter\options\expandafter}\expandafter{\opts}{#2}%
+ }
+}
+\newcommand\gateoutput[2][]{%
+ \pgfkeys{/quantikz,wires=1,style=,label style=,braces=}
+ \pgfkeys{/quantikz,#1}%
+ \edef\newoptions{row=\the\pgfmatrixcurrentrow,col=\the\pgfmatrixcurrentcolumn,#1}
+ \pgfkeysgetvalue{/quantikz/label style}{\options}
+ \pgfkeysgetvalue{/quantikz/braces}{\opts}
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\pgfutil@g@addto@macro\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\tikzcd@atendlabels\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{%
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\mgoutput@end\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter\newoptions\expandafter\expandafter\expandafter}\expandafter\expandafter\expandafter{\expandafter\options\expandafter}\expandafter{\opts}{#2}%
+ }
+}
+%deferred functions for the above
+\newcommand{\mginput@end}[4]{%collected options,label style, brace style,text
+ \pgfkeys{/quantikz,wires=1}
+ \pgfkeys{/quantikz,#1}%
+ \edef\quantwires{\pgfkeysvalueof{/quantikz/wires}}
+ %\pgfkeysgetvalue{/quantikz/wires}{\quantwires}
+ \pgfkeysgetvalue{/quantikz/row}{\row}
+ \pgfkeysgetvalue{/quantikz/col}{\col}
+%can we find the gategroup node?
+\xdef\cell{group\tikzcdmatrixname-1-\col}
+\foreach \n in {\row,...,1} {%
+ %test if node group-\n-#2 exists
+ \ifnodedefined{group\tikzcdmatrixname-\n-\col}{%
+ \xdef\cell{group\tikzcdmatrixname-\n-\col}
+ \breakforeach
+ }{}
+}
+\ifthenelse{\quantwires=1}{%
+ \node at ($(\cell.west |- \tikzcdmatrixname-\row-\col.west)+(0,0cm)$)[leftinternal,#2]{#4};
+}{%
+%\show\quantwires
+\draw[dd,#3] ($(\cell.west |- \tikzcdmatrixname-\row-\col.west)+(0.1cm,0.1cm)$) to node[leftinternal,midway,#2] {#4} ($(\cell.west |- \tikzcdmatrixname-\the\numexpr\row+\quantwires-1\relax-\col.west)+(0.1cm,-0.1cm)$);
+}
+} %
+\newcommand{\mgoutput@end}[4]{%
+ \pgfkeys{/quantikz,wires=1}
+ \pgfkeys{/quantikz,#1}%
+ \edef\quantwires{\pgfkeysvalueof{/quantikz/wires}}
+ %\pgfkeysgetvalue{/quantikz/wires}{\quantwires}
+ \pgfkeysgetvalue{/quantikz/row}{\row}
+ \pgfkeysgetvalue{/quantikz/col}{\col}
+%can we find the gategroup node?
+\xdef\cell{group\tikzcdmatrixname-1-\col}
+\foreach \n in {\row,...,1} {%
+ %test if node group-\n-#2 exists
+ \ifnodedefined{group\tikzcdmatrixname-\n-\col}{%
+ \xdef\cell{group\tikzcdmatrixname-\n-\col}
+ \breakforeach
+ }{}
+}
+\ifthenelse{\quantwires=1}{%
+ \node at ($(\cell.east |- \tikzcdmatrixname-\row-\col.east)+(0,0cm)$)[rightinternal,#2]{#4};
+}{%
+\draw[dm,#3] ($(\cell.east |- \tikzcdmatrixname-\row-\col.east)+(-0.1cm,0.1cm)$) to node[rightinternal,midway,#2] {#4} ($(\cell.east |- \tikzcdmatrixname-\the\numexpr\row+\quantwires-1\relax-\col.east)+(-0.1cm,-0.1cm)$);
+}
+} %
+
+%wave command
+\newcommand\wave[1][]{%
+ \edef\n{\the\pgfmatrixcurrentrow}
+ \expandafter\pgfutil@g@addto@macro\expandafter\tikzcd@atendslices\expandafter{%
+ \expandafter\wave@end\expandafter{\n}{#1}%
+ }
+}
+%deferred wave
+\newcommand{\wave@end}[2]{
+ \node (wave-#1) [fit=(\tikzcdmatrixname-row#1),wave,#2] {};
+}
+
+%put a border around a group of gates
+\newcommand\gategroup[2][]{%
+ \pgfkeys{/quantikz,wires=1,style=,label style=,braces=}
+ \pgfkeys{/quantikz,#1}%
+ \edef\newoptions{row=\the\pgfmatrixcurrentrow,col=\the\pgfmatrixcurrentcolumn,#1}
+ \pgfkeysgetvalue{/quantikz/style}{\options}
+ \pgfkeysgetvalue{/quantikz/label style}{\opts}
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\pgfutil@g@addto@macro\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\tikzcd@atendlabels\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{%
+ \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\gategroup@end\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter\newoptions\expandafter\expandafter\expandafter}\expandafter\expandafter\expandafter{\expandafter\options\expandafter}\expandafter{\opts}{#2}%
+ }
+}
+%deferred gate group command
+\newcommand{\gategroup@end}[4]{%options, gate style, text style, text
+ \pgfkeys{/quantikz,wires=1,style=,label style=,braces=,steps=1}%
+ \edef\background{0}%
+ \pgfkeys{/quantikz,#1}%
+ \pgfkeysgetvalue{/quantikz/wires}{\quantwires}%
+ \pgfkeysgetvalue{/quantikz/row}{\row}%
+ \pgfkeysgetvalue{/quantikz/col}{\col}%
+ \pgfkeysgetvalue{/quantikz/steps}{\steps}%
+ \edef\fit{(\tikzcdmatrixname-col\col.west |- \tikzcdmatrixname-row\row.north)(\tikzcdmatrixname-col\the\numexpr\col+\steps-1\relax.east |- \tikzcdmatrixname-row\the\numexpr\row+\quantwires-1\relax.south)}%
+ \ifthenelse{\background=1}{%
+ \begin{scope}[on background layer]\node (ggroup-\row-\col) [fit=\fit,ggroup,label={[group label,#3]:#4},#2] {};\end{scope}
+ }{%
+ \node (ggroup-\row-\col) [fit=\fit,ggroup,label={[group label,#3]:#4},#2] {};
+ }
+}
+
+%use for fudging classical wires that have horizontal and vertical sections
+\newcommand{\cwbend}[1]{
+ \vcw{#1}\cw
+ \edef\cell{\the\pgfmatrixcurrentrow-\the\pgfmatrixcurrentcolumn}
+ \expandafter\pgfutil@g@addto@macro\expandafter\tikzcd@atendlabels\expandafter{%
+ \expandafter\latephase@end\expandafter{\cell}
+ }
+}
+
+\newcommand{\latephase@end}[1]{
+ \node [phase,inner sep=2pt] at (\tikzcdmatrixname-#1) {};
+}
+
+%patch tikzcd to allow for multiple layers of commands
+\patchcmd\tikzcd@{\tikzpicture}{\def\toslice{0}\def\vert{0}
+ \begin{tikzpicture}}{}{}
+\patchcmd\tikzcd@
+ {\global\let\tikzcd@savedpaths\pgfutil@empty}
+ {\global\let\tikzcd@savedpaths\pgfutil@empty
+ \global\let\tikzcd@atendsavedpaths\pgfutil@empty
+ \global\let\tikzcd@atendlabels\pgfutil@empty
+ \global\let\tikzcd@atendslices\pgfutil@empty
+ \global\let\tikzcd@atendglobals\pgfutil@empty
+ \pgfutil@g@addto@macro\tikzcd@savedpaths\DivideRowsCols
+ %\pgfmathsetmacro{\mname}{random(100000)}
+ \ifthenelse{\toslice=1}{\ifthenelse{\vert=0}{\pgfutil@g@addto@macro\tikzcd@atendslices\sliceallr}{\pgfutil@g@addto@macro\tikzcd@atendslices\sliceallvr}}{}
+ }{}{}
+
+%this patching works on modern systems, but I believe is incompatible with the old version that arXiv is running
+%\patchcmd\endtikzcd{\tikzcd@savedpaths}{\tikzcd@savedpaths\tikzcd@atendsavedpaths\tikzcd@atendlabels\tikzcd@atendslices{\globaldefs=1\tikzcd@atendglobals}}{}{}
+
+%instead, completely redefine the function
+\def\endtikzcd{%
+ \pgfmatrixendrow\egroup%
+ \pgfextra{\global\let\tikzcdmatrixname\tikzlastnode};%
+ \tikzcdset{\the\pgfmatrixcurrentrow-row diagram/.try}%
+ \begingroup%
+ \pgfkeys{% `quotes' library support
+ /handlers/first char syntax/the character "/.initial=\tikzcd@forward@quotes,%
+ /tikz/edge quotes mean={%
+ edge node={node [execute at begin node=\iftikzcd@mathmode$\fi,%$
+ execute at end node=\iftikzcd@mathmode$\fi,%$
+ /tikz/commutative diagrams/.cd,every label,##2]{##1}}}}%
+ \let\tikzcd@errmessage\errmessage% improve error messages
+ \def\errmessage##1{\tikzcd@errmessage{##1^^J...^^Jl.\tikzcd@lineno\space%
+ I think the culprit is a tikzcd arrow in cell \tikzcd@currentrow-\tikzcd@currentcolumn}}%
+ \tikzcd@before@paths@hook%
+ \tikzcd@savedpaths\tikzcd@atendsavedpaths\tikzcd@atendlabels\tikzcd@atendslices{\globaldefs=1\tikzcd@atendglobals}%I just added stuff here instead
+ \endgroup%
+ \end{tikzpicture}%
+ \ifnum0=`{}\fi}
+
+
+%end patching
+%\makeatother
+
+%this command runs after we've finished the matrix, and makes unified cells for each row and each column. This allows much nicer alignment of large boxes.
+\newcommand{\DivideRowsCols}{
+ \foreach \n in {1,...,\the\pgfmatrixcurrentrow} {%for each row, construct a master cell that contains all entries
+ \xdef\LoopRow{}
+ \foreach \m in {1,...,\the\pgfmatrixcurrentcolumn}{
+ \ifnodedefined{\tikzcdmatrixname-\n-\m}{
+ \xdef\LoopRow{\LoopRow(\tikzcdmatrixname-\n-\m)}
+ }{}
+ \ifnodedefined{group\tikzcdmatrixname-\n-\m}{
+ \xdef\LoopRow{\LoopRow(group\tikzcdmatrixname-\n-\m)}
+ }{}
+ }
+ \node (\tikzcdmatrixname-row\n) [fit=\LoopRow] {};
+ }
+ \foreach \n in {1,...,\the\pgfmatrixcurrentcolumn} {%for each column, construct a master cell that contains all entries
+ \xdef\LoopCol{}
+ \foreach \m in {1,...,\the\pgfmatrixcurrentrow}{
+ \ifnodedefined{\tikzcdmatrixname-\m-\n}{
+ \xdef\LoopCol{\LoopCol(\tikzcdmatrixname-\m-\n)}
+ }{}
+ \ifnodedefined{group\tikzcdmatrixname-\m-\n}{
+ \xdef\LoopCol{\LoopCol(group\tikzcdmatrixname-\m-\n)}
+ }{}
+ }
+ \node (\tikzcdmatrixname-col\n) [fit=\LoopCol] {};
+ }
+}
+
+%initialise all the pgfkeys for key=value parametre passing in macro options
+
+\pgfkeys{/tikz/slice all/.code={\def\toslice{1}},/tikz/remove end slices/.initial=0,/tikz/slice titles/.initial={\col},/tikz/slice style/.initial={},/tikz/slice label style/.initial={},/tikz/thin lines/.code={\resetstyles},/tikz/transparent/.code={\maketransparent},/tikz/vertical slice labels/.code={\def\vert{1}}}
+\pgfkeys{/quantikz/.is family,/quantikz,%
+.unknown/.style={%
+ /quantikz/wires=\pgfkeyscurrentname
+},%
+wires/.initial=1,%
+style/.initial={},label style/.initial={},braces/.initial={},background/.code={\def\background{1}},alternate/.code={\def\helper{1}},row/.initial=1,col/.initial=1,steps/.initial=1,Strike Width/.initial=0.08cm,Strike Height/.initial=0.12cm,swap/.code={\def\toswap{1}},disable auto height/.code={\def\DisableMinSize{1}},cwires/.initial={-1},nwires/.initial={-1}}
+
+%my standard Dirac notation commands. can be overridden by user.
+\providecommand{\ket}[1]{\ensuremath{\left|#1\right\rangle}}
+\providecommand{\bra}[1]{\ensuremath{\left\langle#1\right |}}
+\providecommand{\proj}[1]{\ensuremath{\ket{#1}\!\bra{#1}}}
+\providecommand{\braket}[2]{\ensuremath{\left\langle#1\middle|#2\right\rangle}}
+
+%single qubit operations
+\newcommand{\phantomgate}[1]{|[linecont,thickness, inner ysep=3pt]| \phantom{#1} \qw}
+\newcommand{\hphantomgate}[1]{|[linecont,minimum size=1.5em,thickness]| \hphantom{#1} \qw}
+\newcommand{\push}[1]{#1 \qw}
+\newcommand{\alias}[1]{|[alias=#1]|}
+\DeclareExpandableDocumentCommand{\phase}{O{}m}{|[phase,#1,label={[phase label,#1]#2}]| {} \qw}
+\DeclareExpandableDocumentCommand{\control}{O{}m}{|[phase,#1]| {} \qw}
+\DeclareExpandableDocumentCommand{\ocontrol}{O{}m}{|[ophase,#1]| {} \qw}
+\DeclareExpandableDocumentCommand{\targ}{O{}m}{|[circlewc,#1]| {} \qw}
+\DeclareExpandableDocumentCommand{\targX}{O{}m}{|[crossx2,#1]| {} \qw}
+\newcommand{\linethrough}{|[linecont, inner ysep=3pt]| }
+
+%measuring
+\DeclareExpandableDocumentCommand{\meter}{O{}{m}}{|[meter,label={[my label]#2},#1]| {} \qw}
+\DeclareExpandableDocumentCommand{\measuretab}{O{}{m}}{|[measuretab,#1]| {#2} \qw}
+\DeclareExpandableDocumentCommand{\meterD}{O{}{m}}{|[meterD,#1]| {#2} \qw}
+\DeclareExpandableDocumentCommand{\measure}{O{}{m}}{|[measure,#1]| {#2} \qw}
+
+%controlled gates
+\def\ctrl#1{\control{} \vqw{#1}}
+\def\octrl#1{\ocontrol{}\vqw{#1}}
+\def\swap#1{%
+ \targX{}
+ \edef\start{\the\pgfmatrixcurrentrow-\the\pgfmatrixcurrentcolumn}
+ \edef\end{\the\numexpr#1+\pgfmatrixcurrentrow\relax-\the\pgfmatrixcurrentcolumn}
+ \expandafter\expandafter\expandafter\vqwexplicitcenter\expandafter\expandafter\expandafter{\expandafter\start\expandafter}\expandafter{\end}
+}
+
+%vertical wires
+%classical vertical wire, relative positioning
+\newcommand{\vcw}[1]{
+ \edef\start{\the\pgfmatrixcurrentrow-\the\pgfmatrixcurrentcolumn}
+ \edef\end{\the\numexpr#1+\pgfmatrixcurrentrow\relax-\the\pgfmatrixcurrentcolumn}
+ \expandafter\expandafter\expandafter\vcwexplicit\expandafter\expandafter\expandafter{\expandafter\start\expandafter}\expandafter{\end}
+}
+%vertical quantum wire, relative positioning
+\newcommand{\vqw}[1]{
+ \edef\start{\the\pgfmatrixcurrentrow-\the\pgfmatrixcurrentcolumn}
+ \edef\end{\the\numexpr#1+\pgfmatrixcurrentrow\relax-\the\pgfmatrixcurrentcolumn}
+ \expandafter\expandafter\expandafter\vqwexplicit\expandafter\expandafter\expandafter{\expandafter\start\expandafter}\expandafter{\end}
+}
+%quantum wire, absolute positioning
+\newcommand{\vqwexplicit}[2]{
+ \arrow[from=#1,to=#2,arrows] {}
+}
+%classical vertical wire, absolute positioning
+\newcommand{\vcwexplicit}[2]{
+ \arrow[from=#1,to=#2,arrows,xshift=0.05cm] {}\arrow[from=#1,to=#2,arrows,xshift=-0.05cm] {}
+}
+%classical horizontal wire, absolute positioning
+\newcommand{\vcwhexplicit}[2]{
+ \arrow[from=#1,to=#2,arrows,yshift=0.05cm] {}\arrow[from=#1,to=#2,arrows,yshift=-0.05cm] {}
+}
+%quantum wire, absolute positioning, going to centres of cell, not edge.
+\newcommand{\vqwexplicitcenter}[2]{
+ \arrow[from=#1,to=#2,arrows,start anchor=center,end anchor=center] {}
+}
+
+%horizontal wires
+\newcommand{\qw}{\ifthenelse{\the\pgfmatrixcurrentcolumn>1}{\arrow[arrows]{l}}{}}
+\newcommand{\cw}{\ifthenelse{\the\pgfmatrixcurrentcolumn>1}{\arrow[arrows,yshift=0.05cm]{l}\arrow[arrows,yshift=-0.05cm]{l}}{}}
+%define the strike distance for strike-through on qwbundle.
+%\newcommand*{\StrikeDistance}{0.1cm}%
+%a bundle of horizontal quantum wires
+\newcommand{\qwbundle}[2][]{\ifthenelse{\the\pgfmatrixcurrentcolumn>1}{
+ \def\helper{0}
+ \pgfset{/quantikz,#1}
+ \ifthenelse{\helper=1}{
+ \arrow[arrows,yshift=0.1cm]{l}\arrow[arrows]{l}\arrow[arrows,yshift=-0.1cm]{l}
+ }{
+ \arrow[phantom,strike arrow]{l}[xshift=\pgfkeysvalueof{/quantikz/Strike Width}, yshift=\pgfkeysvalueof{/quantikz/Strike Height},anchor=south west,inner sep=0pt]{\scriptstyle #2}
+ }}{}}
+
+
+
+
+%configure some of the style properties.
+\tikzcdset{row sep/normal=0.5cm,column sep/normal=0.5cm,thick,nodes in empty cells,
+ every cell/.style={
+ anchor=center,minimum size=0pt,inner sep=0pt,outer sep=0pt,thick
+ },
+ arrows/.style={dash,thick},
+ 1-row diagram/.style={}
+ }
+\tikzset{
+ thickness/.style={thick},
+ operator/.style={draw,fill=white,minimum size=1.5em, inner sep=2pt,thickness,align=center},
+ ggroup/.style={draw,minimum size=1.5em,thickness,align=center,inner sep=4pt},
+ leftinternal/.style={anchor=mid west,font=\scriptsize,inner sep=4pt,align=center},
+ rightinternal/.style={anchor=mid east,font=\scriptsize,inner sep=4pt,align=center},
+ wave/.style={inner sep=-3pt,tape,fill=white,apply={draw=black} except on segments {5,6,1,2,9}},
+ phase/.style={fill,shape=circle,minimum size=4pt},
+ phase label/.style={label distance=2mm,anchor=mid,label position=45},
+ ophase/.style={fill=white,draw=black,shape=circle,minimum size=4pt},
+ internal/.style={thickness,black},
+ line/.style={path picture={
+\draw[internal](path picture bounding box.west) -- (path picture bounding box.east);
+}},
+ linecont/.style={circle,line},
+ cross/.style={path picture={
+\draw[internal](path picture bounding box.north) -- (path picture bounding box.south) (path picture bounding box.west) -- (path picture bounding box.east);
+}},
+ circlewc/.style={draw,circle,cross,minimum width=4pt,inner sep=3pt},
+ crossx/.style={path picture={
+\draw[internal,inner sep=0pt]
+(path picture bounding box.south east) -- (path picture bounding box.north west) (path picture bounding box.south west) -- (path picture bounding box.north east) (path picture bounding box.west) -- (path picture bounding box.east);
+}},
+ crossx2/.style={circle,crossx,minimum size=1em},
+ dd/.style={decoration={brace},decorate,thickness},
+ dm/.style={decoration={brace,mirror},decorate,thickness},
+ slice/.style={thickness,red,dash pattern=on 5pt off 3pt,align=center},
+ meter/.style={draw,fill=white,minimum width=2em,minimum height=1.5em, rectangle, font=\vphantom{A}, thickness,
+ path picture={\draw[black] ([shift={(.1,.24)}]path picture bounding box.south west) to[bend left=50] ([shift={(-.1,.24)}]path picture bounding box.south east);\draw[black,-{Latex[scale=0.6]}] ([shift={(0,.1)}]path picture bounding box.south) -- ([shift={(.3,-.1)}]path picture bounding box.north);}},
+ measuretab/.style={draw,signal,signal to=west,inner sep=4pt,fill=white},
+ meterD/.style={draw,rounded rectangle,rounded rectangle left arc=none,inner sep=4pt,fill=white},
+ measure/.style={draw,rounded rectangle,inner sep=4pt,fill=white},
+ my label/.style={yshift=0.1cm,above,align=center},
+ gg label/.style={label position=center,align=center},
+ group label/.style={label position=above,yshift=0.2cm,anchor=mid},
+ strike arrow/.style={
+ decoration={markings, mark=at position 0.5 with {
+ \draw [internal,-]
+ ++ (-\pgfkeysvalueof{/quantikz/Strike Width},-\pgfkeysvalueof{/quantikz/Strike Height} )
+ -- ( \pgfkeysvalueof{/quantikz/Strike Width}, \pgfkeysvalueof{/quantikz/Strike Height});} %can I use pgfkeys and do some maths here?
+ },
+ postaction={decorate},
+}
+}
+
+\def\resetstyles{
+\tikzcdset{thin,every cell/.append style={thin},arrows/.append style={thin}
+ }
+\tikzset{
+ thickness/.style={thin},
+ %operator/.append style={thin},
+ %internal/.append style={thin},
+ %dd/.append style={thin},
+ %dm/.append style={thin},
+ %slice/.append style={thin},
+ meter/.append style={thin},
+ phase/.append style={minimum size=3pt},
+ ophase/.append style={minimum size=3pt},
+ %circlewc/.append style={minimum size=3pt,inner sep=2pt}
+}
+}
+
+\def\maketransparent{
+\tikzset{
+ operator/.append style={fill opacity=0},
+ meter/.append style={fill opacity=0}
+}
+} \ No newline at end of file