在 beamer 中按列对齐文本和方程式

Question

我有一个beamer由两列（顶部对齐）组成的框架，使用了该[T]选项。第二列包含一个align方程块。即使我使用了该[T]选项，包含方程的列也会不是与左列中的文本对齐。当在等式前面放置一行文本时，对齐效果很好。那么我遗漏了什么？

这是 MWE

\documentclass{beamer}
\DeclareMathOperator{\IM}{Im}
\begin{document}
\newcommand{\highlight}[1]{\colorbox{yellow}{$\displaystyle #1$}}
\begin{frame}
    \begin{columns}[T]
        \column{0.4\textwidth}
        Transverse MO Kerr effect
        {\tiny [Zvezdin, Modern Magnetooptics, IOP 1999]}
        \column{0.6\textwidth}
        %\centering test
        \begin{align*}
        r_p(M) &= r^0_p\left(1+i\rho_p(M)\right)\\
        \rho_p(M) &=\frac{-ir_p^0\epsilon_g(M)/\epsilon_z\sin\varphi}{2(\eta^2-\sin^2\varphi)^{1/2}}\\
            [r_s(M) &= r^0_s\quad\eta =n/n_\mathrm{inc}]\\
            \delta_p &= \frac{I(M)-I_0}{I_0} = \highlight{2\IM(\rho_p)} %\quad \textcolor{red}{\textbf{\only on lossy MO materials}}
        \end{align*}\par
        \centering$\color{red}\Rightarrow$ \textcolor{red}{\textbf{only on lossy MO materials}}
    \end{columns}

\end{frame}

\begin{frame}
    \begin{columns}[T]
        \column{0.4\textwidth}
        Transverse MO Kerr effect
        {\tiny [Zvezdin, Modern Magnetooptics, IOP 1999]}
        \column{0.6\textwidth}
        \centering test
        \begin{align*}
        r_p(M) &= r^0_p\left(1+i\rho_p(M)\right)\\
        \rho_p(M) &=\frac{-ir_p^0\epsilon_g(M)/\epsilon_z\sin\varphi}{2(\eta^2-\sin^2\varphi)^{1/2}}\\
            [r_s(M) &= r^0_s\quad\eta =n/n_\mathrm{inc}]\\
            \delta_p &= \frac{I(M)-I_0}{I_0} = \highlight{2\IM(\rho_p)} %\quad \textcolor{red}{\textbf{\only on lossy MO materials}}
        \end{align*}\par
        \centering$\color{red}\Rightarrow$ \textcolor{red}{\textbf{only on lossy MO materials}}
    \end{columns}

\end{frame}

\end{document}

Answer 1

align在\abovedisplayskip其顶部上方。你必须去掉它。另外，由于将其设为零会将方程式带到下一行（显示方程式！）

\setlength{\abovedisplayskip}{-\baselineskip}

就可以了。此外，你需要在

{\tiny [Zvezdin, Modern Magnetooptics, IOP 1999]\par}

代码：

\documentclass{beamer}
\DeclareMathOperator{\IM}{Im}
\begin{document}
\newcommand{\highlight}[1]{\colorbox{yellow}{$\displaystyle #1$}}
\begin{frame}
    \begin{columns}
        \column[t]{0.4\textwidth}
        Transverse MO Kerr effect
        {\tiny [Zvezdin, Modern Magnetooptics, IOP 1999]\par}   %% you need a \par here
        \column[t]{0.6\textwidth}
        \setlength{\abovedisplayskip}{-\baselineskip}
        %\centering test
        \begin{align*}
        r_p(M) &= r^0_p\left(1+i\rho_p(M)\right)\\
        \rho_p(M) &=\frac{-ir_p^0\epsilon_g(M)/\epsilon_z\sin\varphi}{2(\eta^2-\sin^2\varphi)^{1/2}}\\
            [r_s(M) &= r^0_s\quad\eta =n/n_\mathrm{inc}]\\
            \delta_p &= \frac{I(M)-I_0}{I_0} = \highlight{2\IM(\rho_p)} %\quad \textcolor{red}{\textbf{\only on lossy MO materials}}
        \end{align*}\par
        \centering$\color{red}\Rightarrow$ \textcolor{red}{\textbf{only on lossy MO materials}}
    \end{columns}

\end{frame}
\end{document}