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| documentation:standard_operators:spin:start [2016/10/05 23:47] – created Maurits W. Haverkort | documentation:standard_operators:spin:start [2024/07/11 07:57] (current) – Maurits W. Haverkort | ||
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| + | {{indexmenu_n> | ||
| + | ====== Spin operators (S) ====== | ||
| + | ### | ||
| + | The spin operators need as a basis definition two lists of equal length. The $\textit{up}$ list indexes the orbitals with spin up, the $\textit{down}$ list indexes the orbitals with spin down. I will generally use the even numbers for spin down and the odd numbers for spin up. (note that this yields the same basis definition as used in the $\textit{Mathematica}$ package of Quanty and thus is needed if one mixes both codes) | ||
| + | <code Quanty Example.Quanty> | ||
| + | IndexDn = {0,2,4,6} | ||
| + | IndexUp = {1,3,5,7} | ||
| + | </ | ||
| + | ### | ||
| + | |||
| + | ===== Table of contents ===== | ||
| + | {{indexmenu> | ||
