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documentation:standard_operators:spin:start [2016/10/05 23:47] – created Maurits W. Haverkortdocumentation:standard_operators:spin:start [2024/07/11 07:57] (current) Maurits W. Haverkort
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 +{{indexmenu_n>1}}
 +====== 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}
 +</code>
 +###
 +
 +===== Table of contents =====
 +{{indexmenu>.#1}}
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