braketpackages
I want to write the following symbol in LaTeX:
I'm using the following (minimal) code:
\documentclass[12pt,twoside]{article}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsthm}
\usepackage{amsfonts}
\usepackage{braket}
\begin{document}
\begin{equation}
\ket \psi{(t)}
\end{equation}
\end{document}
I don't however get the desired result. The $t$ symbol appears outside the ket, as opposed to the output in the figure. How do I fix this?
The macros with uppercase initial are "self-expanding" based on the contents, as the documentation says. Just like it's not good to always use \left and \right, it's also good to choose with care between \Bra and \bra.
As far as the additional spacing is concerned, a solution is to load mleftright:
\documentclass{article}
\usepackage{amsmath}
\usepackage{braket,mleftright}
\mleftright
\begin{document}
\begin{align*}
\Bra{\frac{1}{\sqrt{2}}\left(\uparrow + \downarrow\right)}
&=\frac{1}{\sqrt{2}}\left(\Bra{\uparrow}+\Bra{\downarrow}\right)\\
\bra{\frac{1}{\sqrt{2}}\left(\uparrow + \downarrow\right)}
&=\frac{1}{\sqrt{2}}\left(\bra{\uparrow}+\bra{\downarrow}\right)\\
&=2 222 22\\
&=2\mathinner{222}22\\
\end{align*}
\end{document}
Use \braket{0|0}:
\documentclass{standalone}
\usepackage{braket}
\begin{document}
$\braket{0|0}$
\end{document}
Best Answer
you've placed the
(t)outside the scope of the\ketcommand.just move the open brace before the
\psi:off-topic: since
amssymbloadsamsfontsautomatically, it's not necessary to specify them both.