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Fix latex drawer symmetrical gates display #6877

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Fix latex drawer symmetrical gates display #6877

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f114213
Fixed symmetrical gates bug in latex drawer
jsistos Mar 19, 2021
c1d97ad
Merge branch 'master' of https://github.com/Qiskit/qiskit-terra into …
jsistos Mar 19, 2021
485120b
fixed tests with symmetrical gates
jsistos Mar 20, 2021
9727a5a
Merge branch 'master' into fix6050
jsistos Mar 20, 2021
1c1f580
Added variable hspace to latex output
jsistos Mar 20, 2021
440f190
Merge branch 'master' of https://github.com/Qiskit/qiskit-terra into …
jsistos Mar 20, 2021
ed9b4ba
Merge branch 'fix6050' of https://github.com/jsistos/qiskit-terra int…
jsistos Mar 20, 2021
cf58afd
fixed lint
jsistos Mar 20, 2021
7b98474
Updated number of symgate columns to 5
jsistos Mar 21, 2021
43fcbed
Merge branch 'master' into fix6050
jsistos Mar 23, 2021
2d95216
Merge branch 'master' into fix6050
jsistos Mar 24, 2021
359ebb7
Merge branch 'master' into fix6050
jsistos Mar 25, 2021
e16ef50
Merge branch 'master' into fix6050
jsistos Mar 29, 2021
795491a
Merge branch 'master' into fix6050
jsistos Apr 2, 2021
32b5bca
Fix pull conflicts
enavarro51 Aug 5, 2021
8cb5d83
Fix ref images
enavarro51 Aug 5, 2021
207bc43
Lint
enavarro51 Aug 5, 2021
d1b8026
Fix latex merge conflicts
enavarro51 Aug 19, 2021
8172c4a
Lint
enavarro51 Aug 19, 2021
5e7d0df
Fix merge conflict
enavarro51 Oct 8, 2021
831921c
Merge branch 'main' into fix6050_2
1ucian0 Jan 31, 2022
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12 changes: 9 additions & 3 deletions qiskit/visualization/latex.py
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Expand Up @@ -167,6 +167,8 @@ def latex(self):
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
"""
header_scale = "\\scalebox{{{}}}".format(self.scale) + "{"

Expand Down Expand Up @@ -328,7 +330,7 @@ def _get_image_depth(self):
# which take 4 columns
base_type = None if not hasattr(op, "base_gate") else op.base_gate
if isinstance(op, RZZGate) or isinstance(base_type, (U1Gate, PhaseGate, RZZGate)):
column_width = 4
column_width = 5
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I was just trying out some gates. I feel in the below circuit the gap between the first and the second layer of gates is large. I think this trouble arises whenever there is a large gate in the same layer as that of the symmetric gate.

from math import pi

qc = QuantumCircuit(4)
qc.u3(0.23123414,0.1223412343,0.3412342345,0)
qc.cu1(0.123456,1,2)
qc.rzz(pi,3,1)
qc.cp(pi/3,0,1)
qc.swap(0,1)

qc.draw('latex)

image

Do you think we can we do something about this?

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We could go back to 4 columns, but then the ZZ gate may overlap with the next layer of gates in case there aren't wider gates giving some extra space. (I'm not entirely sure, but I think ZZ is the only gate with such issue).

image

As @enavarro51 said in #6061, changing the number of columns based on the gate text may add unnecessary complexness. My take had been trying to use a smaller font for the labels, but I was unable to figure it out.

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Although, if only RZZ allows for the overlap to happen, then maybe we could just split the column counts (5 for RZZ, 4 otherwise). The issue would still remain for RZZ gates in the same layer as other (large enough) gates, though.

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I think this is a bit of a messy problem. I agree with @TharrmashasthaPV that the spacing is too wide. The problem is that qcircuit takes care of spacing for gates, but doesn't know what to do with this arbitrary side text, so it deals with it as if it is just the 2 bullets and a vertical line in terms of horizontal space.

image

image

There's a simple (kind of) solution which is just to restrict the floats to 1 decimal and lower case ZZ (which is what it used to be), then set cols to increment by 3 instead of 5. Not perfect, but maybe acceptable?

image

But then you run into this.

image

Ultimately this should work the same as gates, where the sidetext is a special gate that expands the space to the next column based on the width of the text. Maybe need a \newcommand?

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maybe \phantom could help to normalize the space?

Forcing the amount of decimals sounds like a too drastic solution to me.

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I've been thinking about this issue a fair bit, tried using \phantom but that didn't seem to resolve much. I think we need a way to dynamically change the number of columns depending on the length of the gate_text. When the actual gate is drawn, is it always placed in the centre of the columns? If yes then as we increase the number of columns we will also inadvertently be increasing the space on the left of the gate. Maybe another solution would be to have gates with side text not placed in the centre of the columns but on the left hand side.

max_column_widths.append(current_max)
columns += column_width

Expand Down Expand Up @@ -527,8 +529,12 @@ def _build_symmetric_gate(self, op, gate_text, wire_list, col):
)
self._latex[wire_last][col] = "\\control \\qw"
# Put side text to the right between bottom wire in wire_list and the one above it
self._latex[wire_max - 1][col + 1] = "\\dstick{\\hspace{2.0em}%s} \\qw" % gate_text
return 4 # num_cols for side text gates
# \settowidth allows redefining \glen to the width of the gate. This avoids overlapping.
self._latex[wire_max][col] += (
" \\cds{-1}{\\settowidth{\\glen}{\\ensuremath{%s}}"
" \\hspace{0.5em}\\hspace{\\glen}\\ensuremath{%s}}" % (gate_text, gate_text)
)
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As far as I could check, I think \hphantom latex command also creates empty space as required. So I think on replacing lines 533-536 by

self._latex[wire_max][col] += (
    " \\cds{-1}{\hspace{0.5em}\hphantom{\\ensuremath{%s}}"
    "\\ensuremath{%s}}" % (gate_text, gate_text)
)

we should still get the required spacing correctly.

return 5 # num_cols for side text gates

def _build_measure(self, node, col):
"""Build a meter and the lines to the creg"""
Expand Down
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_4597.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \qw & \qw & \qw & \qw\\
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2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_big_gates.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=1.0em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \multigate{2}{\mathrm{iqp:[[6\,5\,3];\,[5\,4\,5];\,[3\,5\,1]]}}_<<<{0} & \gate{\mathrm{Unitary}} & \qw & \qw\\
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26 changes: 0 additions & 26 deletions test/python/visualization/references/test_latex_boolean_negation.tex
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This file was deleted.

2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_cnot.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{X}} & \ctrl{1} & \ctrl{1} & \ctrlo{1} & \ctrl{1} & \qw & \qw\\
Expand Down
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_conditional.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{H}} & \meter & \qw & \gate{\mathrm{H}} & \qw & \qw\\
Expand Down
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_creg_initial_false.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{X}} & \gate{\mathrm{H}} & \qw & \qw\\
Expand Down
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_creg_initial_true.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : \ket{{0}} } & \lstick{ {q}_{0} : \ket{{0}} } & \gate{\mathrm{X}} & \gate{\mathrm{H}} & \qw & \qw\\
Expand Down
12 changes: 7 additions & 5 deletions test/python/visualization/references/test_latex_cswap_rzz.tex
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Expand Up @@ -4,12 +4,14 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{X}} & \ctrl{1} & \control \qw & \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{1} : } & \lstick{ {q}_{1} : } & \gate{\mathrm{X}} & \qswap & \ctrl{-1} & \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{2} : } & \lstick{ {q}_{2} : } & \qw & \qswap \qwx[-1] & \ctrlo{-1} & \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{3} : } & \lstick{ {q}_{3} : } & \qw & \qw & \ctrl{-3} & \dstick{\hspace{2.0em}\mathrm{ZZ}\,(\mathrm{\frac{3\pi}{4}})} \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{4} : } & \lstick{ {q}_{4} : } & \qw & \qw & \ctrlo{-1} & \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{X}} & \ctrl{1} & \control \qw & \qw & \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{1} : } & \lstick{ {q}_{1} : } & \gate{\mathrm{X}} & \qswap & \ctrl{-1} & \qw & \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{2} : } & \lstick{ {q}_{2} : } & \qw & \qswap \qwx[-1] & \ctrlo{-1} & \qw & \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{3} : } & \lstick{ {q}_{3} : } & \qw & \qw & \ctrl{-3} & \qw & \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{4} : } & \lstick{ {q}_{4} : } & \qw & \qw & \ctrlo{-1} \cds{-1}{\settowidth{\glen}{\ensuremath{\mathrm{ZZ}\,(\mathrm{\frac{3\pi}{4}})}} \hspace{0.5em}\hspace{\glen}\ensuremath{\mathrm{ZZ}\,(\mathrm{\frac{3\pi}{4}})}} & \qw & \qw & \qw & \qw & \qw & \qw\\
\\ }}
\end{document}
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_deep.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \qw & \qw\\
Expand Down
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_empty.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=1.0em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \qw & \qw\\
Expand Down
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_ghz_to_gate.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \ctrl{1} & \qw & \qw\\
Expand Down
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_global_phase.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{{$\mathrm{global\,phase:\,} \mathrm{\frac{\pi}{2}}$}
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{H}} & \qw & \qw\\
Expand Down
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_huge.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{H}} & \ctrl{39} & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw\\
Expand Down
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_init_reset.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=1.0em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{|\psi\rangle\,(\mathrm{0,1})} & \multigate{1}{|\psi\rangle\,(\mathrm{0,1,0,0})}_<<<{0} & \qw & \qw\\
Expand Down
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_inst_with_cbits.tex
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Expand Up @@ -4,6 +4,8 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=1.0em @!R { \\
\nghost{ {qr}_{0} : } & \lstick{ {qr}_{0} : } & \qw & \qw & \qw\\
Expand Down
16 changes: 9 additions & 7 deletions test/python/visualization/references/test_latex_iqx.tex
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Expand Up @@ -4,14 +4,16 @@
\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{H}} & \gate{\mathrm{X}} & \qw & \qw & \qw & \ctrl{1} & \ctrl{1} & \qswap & \ctrl{1} & \ctrl{1} & \multigate{1}{\mathrm{Dcx}}_<<<{0} & \ctrl{1} & \ctrl{1} & \qw & \qw\\
\nghost{ {q}_{1} : } & \lstick{ {q}_{1} : } & \qw & \qw & \qw & \qw & \qw & \targ & \ctrl{1} & \qswap \qwx[-1] & \qswap & \ctrl{1} & \ghost{\mathrm{Dcx}}_<<<{1} & \multigate{1}{\mathrm{Dcx}}_<<<{0} & \ctrl{1} & \qw & \qw\\
\nghost{ {q}_{2} : } & \lstick{ {q}_{2} : } & \qw & \qw & \qw & \qw & \qw & \qw & \targ & \qw & \qswap \qwx[-1] & \qswap & \qw & \ghost{\mathrm{Dcx}}_<<<{1} & \multigate{1}{\mathrm{Dcx}}_<<<{0} & \qw & \qw\\
\nghost{ {q}_{3} : } & \lstick{ {q}_{3} : } & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qswap \qwx[-1] & \qw & \qw & \ghost{\mathrm{Dcx}}_<<<{1} & \qw & \qw\\
\nghost{ {q}_{4} : } & \lstick{ {q}_{4} : } & \gate{\mathrm{Z}} & \gate{\mathrm{S}} & \qw & \qw & \qw & \gate{\mathrm{S^\dagger}} & \gate{\mathrm{T}} & \gate{\mathrm{T^\dagger}} & \gate{\mathrm{P}\,(\mathrm{\frac{\pi}{2}})} & \gate{\mathrm{P}\,(\mathrm{\frac{\pi}{2}})} & \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{5} : } & \lstick{ {q}_{5} : } & \ctrl{1} & \ctrl{1} & \dstick{\hspace{2.0em}\mathrm{P}\,(\mathrm{\frac{\pi}{2}})} \qw & \qw & \qw & \gate{\mathrm{Y}} & \gate{\mathrm{R_X}\,(\mathrm{\frac{\pi}{3}})} & \multigate{1}{\mathrm{R_{ZX}}\,(\mathrm{\frac{\pi}{2}})}_<<<{0} & \gate{\mathrm{U}\,(\mathrm{\frac{\pi}{2},\frac{\pi}{2},\frac{\pi}{2}})} \barrier[0em]{1} & \qw & \gate{\mathrm{\left|0\right\rangle}} & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{6} : } & \lstick{ {q}_{6} : } & \control\qw & \control \qw & \qw & \qw & \qw & \qw & \qw & \ghost{\mathrm{R_{ZX}}\,(\mathrm{\frac{\pi}{2}})}_<<<{1} & \qw & \qw & \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{H}} & \gate{\mathrm{X}} & \qw & \qw & \qw & \qw & \ctrl{1} & \ctrl{1} & \qswap & \ctrl{1} & \ctrl{1} & \multigate{1}{\mathrm{Dcx}}_<<<{0} & \ctrl{1} & \ctrl{1} & \qw & \qw\\
\nghost{ {q}_{1} : } & \lstick{ {q}_{1} : } & \qw & \qw & \qw & \qw & \qw & \qw & \targ & \ctrl{1} & \qswap \qwx[-1] & \qswap & \ctrl{1} & \ghost{\mathrm{Dcx}}_<<<{1} & \multigate{1}{\mathrm{Dcx}}_<<<{0} & \ctrl{1} & \qw & \qw\\
\nghost{ {q}_{2} : } & \lstick{ {q}_{2} : } & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \targ & \qw & \qswap \qwx[-1] & \qswap & \qw & \ghost{\mathrm{Dcx}}_<<<{1} & \multigate{1}{\mathrm{Dcx}}_<<<{0} & \qw & \qw\\
\nghost{ {q}_{3} : } & \lstick{ {q}_{3} : } & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qswap \qwx[-1] & \qw & \qw & \ghost{\mathrm{Dcx}}_<<<{1} & \qw & \qw\\
\nghost{ {q}_{4} : } & \lstick{ {q}_{4} : } & \gate{\mathrm{Z}} & \gate{\mathrm{S}} & \qw & \qw & \qw & \qw & \gate{\mathrm{S^\dagger}} & \gate{\mathrm{T}} & \gate{\mathrm{T^\dagger}} & \gate{\mathrm{P}\,(\mathrm{\frac{\pi}{2}})} & \gate{\mathrm{P}\,(\mathrm{\frac{\pi}{2}})} & \qw & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{5} : } & \lstick{ {q}_{5} : } & \ctrl{1} & \ctrl{1} & \qw & \qw & \qw & \qw & \gate{\mathrm{Y}} & \gate{\mathrm{R_X}\,(\mathrm{\frac{\pi}{3}})} & \multigate{1}{\mathrm{R_{ZX}}\,(\mathrm{\frac{\pi}{2}})}_<<<{0} & \gate{\mathrm{U}\,(\mathrm{\frac{\pi}{2},\frac{\pi}{2},\frac{\pi}{2}})} \barrier[0em]{1} & \qw & \gate{\mathrm{\left|0\right\rangle}} & \qw & \qw & \qw & \qw\\
\nghost{ {q}_{6} : } & \lstick{ {q}_{6} : } & \control\qw & \control \qw \cds{-1}{\settowidth{\glen}{\ensuremath{\mathrm{P}\,(\mathrm{\frac{\pi}{2}})}} \hspace{0.5em}\hspace{\glen}\ensuremath{\mathrm{P}\,(\mathrm{\frac{\pi}{2}})}} & \qw & \qw & \qw & \qw & \qw & \qw & \ghost{\mathrm{R_{ZX}}\,(\mathrm{\frac{\pi}{2}})}_<<<{1} & \qw & \qw & \qw & \qw & \qw & \qw & \qw\\
\\ }}
\end{document}
2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_long_name.tex
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\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {veryLongQuantumRegisterName}_{0} : } & \lstick{ {veryLongQuantumRegisterName}_{0} : } & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \gate{\mathrm{H}} & \qw & \qw\\
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2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_meas_condition.tex
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\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {qr}_{0} : } & \lstick{ {qr}_{0} : } & \gate{\mathrm{H}} & \meter & \qw & \qw & \qw\\
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2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_no_barriers_false.tex
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\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{H}} & \qw & \qw\\
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2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_no_ops.tex
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\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=1.0em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \qw & \qw\\
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2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_normal.tex
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\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{H}} & \qw & \qw\\
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2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_partial_layout.tex
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\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{2}\mapsto{0} : } & \lstick{ {q}_{2}\mapsto{0} : } & \qw & \qw & \qw\\
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2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_pauli_clifford.tex
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\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{X}} & \gate{\mathrm{Y}} & \gate{\mathrm{Z}} & \gate{\mathrm{I}} & \qw & \qw & \qw\\
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2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_pi_param_expr.tex
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\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{R_X}\,(\mathrm{(\pi\,-\,x)*(\pi\,-\,y)})} & \qw & \qw\\
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2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_plot_barriers_false.tex
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\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{H}} & \qw & \qw & \qw & \qw & \qw\\
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2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_plot_barriers_true.tex
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\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{H}} \barrier[0em]{1} & \qw & \qw \barrier[0em]{1} & \qw & \qw & \qw\\
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2 changes: 2 additions & 0 deletions test/python/visualization/references/test_latex_plot_partial_barriers.tex
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\usepackage{graphicx}

\begin{document}
% Delete the command below if there are no CP, CU1, RZZ in the circuit.
\newlength{\glen}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
\nghost{ {q}_{0} : } & \lstick{ {q}_{0} : } & \gate{\mathrm{H}} \barrier[0em]{0} & \qw & \gate{\mathrm{H}} & \qw & \qw\\
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