Typesetting quantum circuits in a human-readable language
yquant is a LaTeX package that allows to quickly draw quantum circuits. It bridges the gap between the two groups of packages that already exist: those that use a logic-oriented custom language, which is then translated into TeX by means of an external program; and the pure TeX versions that mainly provide some macros to allow for an easier input. yquant is a pure-LaTeX solution - i.e., it requires no external program - that introduces a logic oriented language and thus brings the best of both worlds together. It builds on and interacts with TiKZ, which brings an enourmous flexibility for customization of individual circuit.
Important features in the latest updates (for a much more complete list, see the documentation):
beamer
package (since 0.6)text
gate, which replaces the common [draw=none] box
situation (since 0.6)subcircuit
hassling (since 0.5)qasm
language (since 0.3)A detailed reference with lots of examples is provided in the PDF version of this Readme. We will sketch some basic usage.
The arXiv runs on version 0.3.2 - please download the latest version from the releases section and include it in your submission.
Support the development:
Many more examples and explanations can be found in the PDF version of this Readme.
\begin{tikzpicture}
\begin{yquant}
qubit {$\ket{\reg_{\idx}}$} q[3];
h q[1];
cnot q[2] | q[1];
cnot q[1] | q[0];
h q[0];
measure q[0-1];
z q[2] | q[1];
x q[2] | q[0];
\end{yquant}
\end{tikzpicture}
\begin{tikzpicture}
\begin{yquant}
qubit {$\ket{j_{\idx}} = \ket0$} j[3];
qubit {$\ket{s_{\idx}}$} s[2];
h j;
box {$U^4$} (s) | j[0];
box {$U^2$} (s) | j[1];
box {$U$} (s) | j[2];
h j[0];
box {$S$} j[1] | j[0];
h j[1];
box {$T$} j[2] | j[0];
box {$S$} j[2] | j[1];
h j[2];
measure j;
\end{yquant}
\end{tikzpicture}
\begin{tikzpicture}
\begin{yquant}
qubit {$\ket{q_{\idx}}$} q[3];
qubit {$\ket{s_{\idx}} = \ket0$} s[2];
cbit {$c_{\idx} = 0$} c[2];
h s[0];
cnot s[1] | s[0];
cnot s[0] | q[0];
cnot s[1] | q[1];
cnot s[1] | s[0];
h s[0];
measure s;
cnot c[0] | s[0];
cnot c[1] | s[1];
discard s;
init {$\ket0$} s;
h s[0];
cnot s[1] | s[0];
cnot s[0] | q[1];
cnot s[1] | q[2];
cnot s[1] | s[0];
h s[0];
measure s;
box {Process\\Syndrome} (s, c);
box {$\mathcal R$} (q) | s, c;
\end{yquant}
\end{tikzpicture}
% \usetikzlibrary{quotes}
\begin{tikzpicture}
\begin{yquant}
qubit {} msg[3];
nobit syndrome[3];
[this subcircuit box style={dashed, "Syndrome Measurement"}]
subcircuit {
qubit {} msg[3];
[out]
qubit {$\ket0$} syndrome[3];
cnot syndrome[0] | msg[0];
cnot syndrome[0] | msg[1];
cnot syndrome[1] | msg[1];
cnot syndrome[1] | msg[2];
cnot syndrome[2] | msg[0];
cnot syndrome[2] | msg[2];
dmeter {$M_{\symbol{\numexpr`a+\idx}}$} syndrome;
} (msg[-2], syndrome[-2]);
["Recovery"]
box {$\mathcal R$} (msg) | syndrome;
discard syndrome;
\end{yquant}
\end{tikzpicture}
\begin{tikzpicture}
\begin{yquant*}
zz (a[0, 2]);
cnot a[1] ~ a[0];
zz (a[2, 3]);
h a[3] | a[0] ~ a[1];
measure a[2, 3];
box {$U$} (a[0, 1]) | a[3] ~ a[2];
discard a[2, 3];
\end{yquant*}
\end{tikzpicture}
% \useyquantlanguage{groups}
\begin{tikzpicture}
\begin{yquantgroup}
\registers{
qubit {} q[2];
}
\circuit{
h -;
cnot q[1] | q[0];
h -;
}
\equals
\circuit{
cnot q[0] | q[1];
}
\end{yquantgroup}
\end{tikzpicture}