====== Splus ====== ### The $S^+$ operator is defined as: \begin{equation} S^+ = \sum_{\tau} a^{\dagger}_{\tau\uparrow}a^{\phantom{\dagger}}_{\tau\downarrow}. \end{equation} The equivalent operator in Quanty is created by: OppSplus = NewOperator("Splus", NF, IndexUp, IndexDn) ### ===== Table of contents ===== {{indexmenu>.#1}}