====== Ly ======

###
The $L_y$ operator is defined as:
\begin{eqnarray}
L_y = \sum_{m=-l}^{m=l}\sum_{\sigma} &&  \frac{\imath}{2}\sqrt{l+m+1}\sqrt{l-m}\\
\nonumber &&\times\left(-a^{\dagger}_{m+1,\sigma}a^{\phantom{\dagger}}_{m,\sigma} + a^{\dagger}_{m,\sigma}a^{\phantom{\dagger}}_{m+1,\sigma}\right).
\end{eqnarray}
The equivalent operator in Quanty is created by:
<code Quanty Example.Quanty>
OppLy = NewOperator("Ly", NF, IndexUp, IndexDn)
</code>
###

===== Table of contents =====
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