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将 Feynman blob 图与 Tikz-Feynman 等同起来

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将 Feynman blob 图与 Tikz-Feynman 等同起来

我正在尝试使用 tikz-feynman（在 overleaf 上）生成一些费曼图。我希望​​特别等同于 blob 图，我设法让它工作了，但它看起来根本不像样子。

我希望得到一些关于如何做到的建议：

1）将方程设为中心

2）将“=”符号设置在中间“高度”（即图表高度的一半）

3) 更改 blob 中文字的字体（bf 看起来很糟糕）

4）改变斑点阴影

抱歉我的问题太多了，但我认为它们都属于 tikz-feynman 的“排版”类别。如果我需要更改问题，请告诉我。感谢您的时间！代码示例：

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}

\usepackage[compat=1.0.0]{tikz-feynman}
\usepackage{contour}

\begin{document}
\begin{equation*}

\begin{tikzpicture}
  \begin{feynman}


    \vertex[blob] (m) at (0,0) {\contour{gray}{$G^c$}};
    \vertex (a) at (-2,-2) ;
    \vertex (b) at ( 2,-2);
    \vertex (c) at (0, 2.8);
    \diagram* {
      (a) -- [edge label=$x_1$] (m) -- [edge label=$x_2$] (b),
      (c) -- [edge label=$x_3$] (m)};
  \end{feynman}

\end{tikzpicture}
\quad = \quad
\begin{tikzpicture}
    \begin{feynman}


      \vertex[blob] (m) at (0,0) {\contour{black}{$G^{1PI}$}};
      \vertex (a) at (-2,-2) ;
      \vertex[blob] (m1) at (0,1.4) {\contour{gray}{$G^c$}};
      \vertex[blob] (m2) at (1,-1) {\contour{gray}{$G^c$}};
      \vertex[blob] (m3) at (-1,-1) {\contour{gray}{$G^c$}};
      \vertex (b) at ( 2,-2);
      \vertex (c) at (0, 2.8);
      \diagram* {
        (a) -- [edge label=$x_1$] (m3) -- [edge label=$z_1$] (m),
        (b) -- [edge label=$x_2$] (m2) -- [edge label=$z_2$] (m),
        (c) -- [edge label=$x_3$] (m1) -- [edge label=$z_3$] (m)};
    \end{feynman}

  \end{tikzpicture}
\end{equation*}
\end{document}

答案1

欢迎！您可以将图表包装到 中\vcenter{\hbox{...}}。另请注意，环境中不能有空行equation*。

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}

\usepackage[compat=1.0.0]{tikz-feynman}
\usepackage{contour}

\begin{document}
\begin{equation*}
\vcenter{\hbox{\begin{tikzpicture}
  \begin{feynman}


    \vertex[blob] (m) at (0,0) {\contour{gray}{$G^c$}};
    \vertex (a) at (-2,-2) ;
    \vertex (b) at ( 2,-2);
    \vertex (c) at (0, 2.8);
    \diagram* {
      (a) -- [edge label=$x_1$] (m) -- [edge label=$x_2$] (b),
      (c) -- [edge label=$x_3$] (m)};
  \end{feynman}
\end{tikzpicture}}}
\quad = \quad
\vcenter{\hbox{\begin{tikzpicture}
    \begin{feynman}
      \vertex[blob] (m) at (0,0) {\contour{black}{$G^{1PI}$}};
      \vertex (a) at (-2,-2) ;
      \vertex[blob] (m1) at (0,1.4) {\contour{gray}{$G^c$}};
      \vertex[blob] (m2) at (1,-1) {\contour{gray}{$G^c$}};
      \vertex[blob] (m3) at (-1,-1) {\contour{gray}{$G^c$}};
      \vertex (b) at ( 2,-2);
      \vertex (c) at (0, 2.8);
      \diagram* {
        (a) -- [edge label=$x_1$] (m3) -- [edge label=$z_1$] (m),
        (b) -- [edge label=$x_2$] (m2) -- [edge label=$z_2$] (m),
        (c) -- [edge label=$x_3$] (m1) -- [edge label=$z_3$] (m)};
    \end{feynman}
  \end{tikzpicture}}}
\end{equation*}
\end{document}

在此处输入图片描述

或者使用不同的粗体字体和不同的斑点。（仅仅说某样东西看起来很糟糕是没有多大帮助的，你可能需要说说它看起来怎么样。）

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}

\usepackage[compat=1.0.0]{tikz-feynman}

\begin{document}
\begin{equation*}
\vcenter{\hbox{\begin{tikzpicture}
  \begin{feynman}[every blob={/tikz/fill=gray!30,/tikz/inner sep=2pt}]
    \vertex[blob] (m) at (0,0) {$\boldsymbol{G^c}$};
    \vertex (a) at (-2,-2) ;
    \vertex (b) at ( 2,-2);
    \vertex (c) at (0, 2.8);
    \diagram* {
      (a) -- [edge label=$x_1$] (m) -- [edge label=$x_2$] (b),
      (c) -- [edge label=$x_3$] (m)};
  \end{feynman}
\end{tikzpicture}}}
\quad = \quad
\vcenter{\hbox{\begin{tikzpicture}
    \begin{feynman}[every blob={/tikz/fill=gray!30,/tikz/inner sep=2pt}]
      \vertex[blob] (m) at (0,0) {$\boldsymbol{G^{1PI}}$};
      \vertex (a) at (-2,-2) ;
      \vertex[blob] (m1) at (0,1.4) {$\boldsymbol{G^c}$};
      \vertex[blob] (m2) at (1,-1) {$\boldsymbol{G^c}$};
      \vertex[blob] (m3) at (-1,-1) {$\boldsymbol{G^c}$};
      \vertex (b) at ( 2,-2);
      \vertex (c) at (0, 2.8);
      \diagram* {
        (a) -- [edge label=$x_1$] (m3) -- [edge label=$z_1$] (m),
        (b) -- [edge label=$x_2$] (m2) -- [edge label=$z_2$] (m),
        (c) -- [edge label=$x_3$] (m1) -- [edge label=$z_3$] (m)};
    \end{feynman}
  \end{tikzpicture}}}
\end{equation*}
\end{document}

在此处输入图片描述

答案2

作为不错的选择回答薛定谔的猫，你可以使用嵌套表格进行垂直居中（见https://tex.stackexchange.com/a/473626/)，保留原始的斑点图案，但将其设置为您喜欢的灰色（例如 80%），然后\mathbf在顶部使用。

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}

\usepackage{tikz-feynman}
\tikzfeynmanset{every blob={/tikz/pattern color={gray!80}}}

\begin{document}

\begin{tabular}{ccc}
% https://tex.stackexchange.com/a/473626/
\begin{tabular}{c}
\begin{tikzpicture}
  \begin{feynman}
    \vertex[blob] (m) at (0,0) {$\mathbf{G^c}$};
    \vertex (a) at (-2,-2) ;
    \vertex (b) at ( 2,-2);
    \vertex (c) at (0, 2.8);
    \diagram* {
      (a) -- [edge label=$x_1$] (m) -- [edge label=$x_2$] (b),
      (c) -- [edge label=$x_3$] (m)};
  \end{feynman}
\end{tikzpicture}
\end{tabular}
&
\begin{tabular}{c}
=
\end{tabular}
&
\begin{tabular}{c}
\begin{tikzpicture}
    \begin{feynman}
      \vertex[blob] (m) at (0,0) {$\mathbf{G^{1PI}}$};
      \vertex (a) at (-2,-2) ;
      \vertex[blob] (m1) at (0,1.4) {$\mathbf{G^c}$};
      \vertex[blob] (m2) at (1,-1) {$\mathbf{G^c}$};
      \vertex[blob] (m3) at (-1,-1) {$\mathbf{G^c}$};
      \vertex (b) at ( 2,-2);
      \vertex (c) at (0, 2.8);
      \diagram* {
        (a) -- [edge label=$x_1$] (m3) -- [edge label=$z_1$] (m),
        (b) -- [edge label=$x_2$] (m2) -- [edge label=$z_2$] (m),
        (c) -- [edge label=$x_3$] (m1) -- [edge label=$z_3$] (m)};
    \end{feynman}
  \end{tikzpicture}
\end{tabular}
\end{tabular}
\end{document}

结果：

在此处输入图片描述

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