From: hackbard <hackbard@hackdaworld.org>
Date: Tue, 26 Feb 2013 07:42:42 +0000 (+0100)
Subject: ice chnages
X-Git-Url: https://hackdaworld.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4533f8a3f2d7319103d979de2255a43ba2cb9235;p=lectures%2Flatex.git

ice chnages
---

diff --git a/physics_compact/solid.tex b/physics_compact/solid.tex
index 5e69a79..bc70eae 100644
--- a/physics_compact/solid.tex
+++ b/physics_compact/solid.tex
@@ -282,18 +282,26 @@ The contributions of this operator act differently on $\ket{l,m}$ and --- in fac
 L_+S_-\ket{l,m,+}=L_+\ket{l,m}S_-\ket{+}=
 \sqrt{(l-m)(l+m+1)}\hbar\ket{l,m+1}\hbar\ket{-}
 \end{equation}
+      Moreover, this part only acts on magnetic quantum numbers
+      $m=-l,\ldots,l-1$ and updates quantum numbers $m=-l+1,\ldots,l$.
 \item \underline{$L_-S_+$}:
       Updates spin up component and only acts on spin down component
 \begin{equation}
-L_+S_-\ket{l,m,-}=L_+\ket{l,m}S_-\ket{+}=
-\sqrt{(l-m)(l+m+1)}\hbar\ket{l,m+1}\hbar\ket{-}
+L_-S_+\ket{l,m,-}=L_+\ket{l,m}S_+\ket{-}=
+\sqrt{(l+m)(l-m+1)}\hbar\ket{l,m-1}\hbar\ket{+}
 \end{equation}
+      Moreover, this part only acts on magnetic quantum numbers
+      $m=-l+1,\ldots,l$ and updates quantum numbers $m=-l,\ldots,l-1$.
 \item \underline{$L_zS_z$}: Acts on both and updates both spinor components
 \begin{equation}
 L_zS_z\ket{l,m,\pm}=L_z\ket{l,m}S_z\ket{\pm}=
 \pm\frac{1}{2}m\hbar^2\ket{l,m,\pm}
 \end{equation}
+      It acts on all magnetic quantum numbers and updates all of them.
 \end{enumerate}
+Please note that the $\ket{l,m,\pm}$ are not eigenfunctions of the two combinations of ladder operators, i.e.\  the $\ket{l,m,\pm}$ do not diagonalize the spin-orbit part of the Hamiltonian.
+(Does this constitute a problem?)
+
 
 \subsubsection{Excursus: Real space representation within an iterative treatment}