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--- documentation:standard_operators:charge_quadrupole:qxx [2016/10/06 08:20] – created Maurits W. Haverkort
+++ documentation:standard_operators:charge_quadrupole:qxx [2025/11/20 03:29] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+====== Qxx ======
+###
+The xx component of $Q$ is defined as:
+\begin{equation}
+Q_{xx} = 3x^2/r^2 - 1.
+\end{equation}
+The equivalent operator in Quanty is created by:
+<code Quanty Example.Quanty>
+OppQxx = NewOperator("Qxx", NF, IndexUp, IndexDn)
+</code>
+The operator could also be defined by:
+<code Quanty Example.Quanty>
+Akm={{2,-2,sqrt(1.5)},{2, 2,sqrt(1.5)},{2,0,-1}}
+OppQxx=NewOperator("CF",NF,indexup,indexdn,Akm)
+</code>
+###
+===== Table of contents =====
+{{indexmenu>.#1}}