====== Sz ======

###
The $S_z$ operator is defined as:
\begin{equation}
S_z = \sum_{\tau} \frac{1}{2}\left(a^{\dagger}_{\tau\uparrow}a^{\phantom{\dagger}}_{\tau\uparrow} - a^{\dagger}_{\tau\downarrow}a^{\phantom{\dagger}}_{\tau\downarrow}\right).
\end{equation}
The equivalent operator in Quanty is created by:
<code Quanty Example.Quanty>
OppSz = NewOperator("Sz",NF,IndexUp,IndexDn)
</code>
###


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