结合 tabularray 和 aligned 环境

Question

我正在尝试让以下内容发挥作用

梅威瑟：

\documentclass{article}
\usepackage{tabularray}
\usepackage{mathtools}

\newcommand*{\tn}[1]{\textnormal{#1}}
\newcommand*{\Utevolv}{\ensuremath{\hat{\mathcal{U}}}}
\newcommand*{\imag}{\mathrm{i}}

% ------------ braket --------------
% mathtools als Voraussetzung.
\DeclarePairedDelimiter\bra{\langle}{\rvert}
\DeclarePairedDelimiter\ket{\lvert}{\rangle}
\DeclarePairedDelimiterX\braketzw[2]{\langle}{\rangle}%
{#1\,\delimsize\vert\,\mathopen{}#2}
\DeclarePairedDelimiterX\braketdr[3]{\langle}{\rangle}%
{#1\,\delimsize\vert\,\mathopen{}#2\,\delimsize\vert\,\mathopen{}#3}

\begin{document}

\begin{tblr}{%
    colspec = {@{}Q[t]Q[t]@{}},%
    column{2} = {mode=dmath}
    }
    General ansatz:    & \ket{\Psi(t)} = \sum_n c_n(t) \ket{n} \\                                                                                                                            \\
    Amplitude $c_k(t)$ & \begin{aligned} %
                             c_k(t) = \braketzw{k}{\Psi(t)} & = \braketdr{k}{\Utevolv(t,t_0)}{\Psi(t_0)}                                                        \\
                                                            & = \braketdr{k}{\Utevolv_0(t,t_0)\, \Utevolv_\tn{I}(t,t_0)}{\Psi(t_0)}                             \\
                                                            & = \exp \left[ - \frac{\imag E_k t}{\hbar} \right] \braketdr{k}{\Utevolv_\tn{I}(t,t_0)}{\Psi(t_0)}
                         \end{aligned} \\
\end{tblr}

\end{document}

输出：

想要的输出：

我希望得到一个顶部对齐的列，但aligned环境和tfortabularray似乎不兼容。任何帮助都将不胜感激。

Answer 1

感谢@UlrikeFischer 和@leandriis。

我没有意识到环境aligned提供了可选参数用于环境本身的对齐。

修复了：

... \begin{aligned}[t] ... 

完整工作示例：

\documentclass{article}
\usepackage{tabularray}
\usepackage{mathtools}

\newcommand*{\tn}[1]{\textnormal{#1}}
\newcommand*{\Utevolv}{\ensuremath{\hat{\mathcal{U}}}}
\newcommand*{\imag}{\mathrm{i}}

% ------------ braket --------------
% mathtools als Voraussetzung.
\DeclarePairedDelimiter\bra{\langle}{\rvert}
\DeclarePairedDelimiter\ket{\lvert}{\rangle}
\DeclarePairedDelimiterX\braketzw[2]{\langle}{\rangle}%
{#1\,\delimsize\vert\,\mathopen{}#2}
\DeclarePairedDelimiterX\braketdr[3]{\langle}{\rangle}%
{#1\,\delimsize\vert\,\mathopen{}#2\,\delimsize\vert\,\mathopen{}#3}

\begin{document}

\begin{tblr}{%
    colspec = {@{}Q[t]Q[t]@{}},%
    column{2} = {mode=dmath}
    }
    General ansatz:    & \ket{\Psi(t)} = \sum_n c_n(t) \ket{n} \\                                                                                                                            \\
    Amplitude $c_k(t)$ & \begin{aligned}[t] %
                             c_k(t) = \braketzw{k}{\Psi(t)} & = \braketdr{k}{\Utevolv(t,t_0)}{\Psi(t_0)}                                                        \\
                                                            & = \braketdr{k}{\Utevolv_0(t,t_0)\, \Utevolv_\tn{I}(t,t_0)}{\Psi(t_0)}                             \\
                                                            & = \exp \left[ - \frac{\imag E_k t}{\hbar} \right] \braketdr{k}{\Utevolv_\tn{I}(t,t_0)}{\Psi(t_0)}
                         \end{aligned} \\
\end{tblr}

\end{document}