correct me if im wrong..(adsbygoogle = window.adsbygoogle || []).push({});

as i see it, i can subtract any constant from the diagonal of the hamiltonian without really changing the system it describes... am i right?

if i got a two state system, the hamiltonian can look like this:

[tex] \left(

\begin{array}{cc}

0 & P_{2->1} \\

P_{1->2} & \Delta E \\

\end{array}

\right)[/tex]

where [tex]\Delta E=H_{22}-H_{11}[/tex]

if im right so far... then here's my problem - when you diagonize the matrix it doesnt have the same eigenvalues (i mean not even the same delta...) if you add or subtract from the diagonal... and that can't be right... so whats wrong in my view of things?

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# Homework Help: Subtracting constant energy

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