\chapter{List of Symbols}

% please change this list to suit your thesis

The following list is neither exhaustive nor exclusive, but may be helpful.
\begin{list}{}{%
\setlength{\labelwidth}{24mm}
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\item[$a$, $b$, $c$, $d$\dotfill] annihilation operators
\item[$a^\dagger$, $b^\dagger$, $c^\dagger$, $d^\dagger$\dotfill] creation
operators
\end{list}