tabs and accordion practise

\begin{enumerate}

\item

To define operators \(a, a^\dagger, N\) in terms

of fields.

\item

To derive commutation properties of \(N, a ,a^\dagger\)

\item

To define a complete orthonormal set.

\item

To construct Hilbert space as linear span of the complete orthonormal

set.

\item

To give interpretation of field operator.

\end{enumerate}