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Results tagged with matrix-elements
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user 254525
Matrix elements are the components, or entries, of a matrix, typically considered in a certain basis.
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Momentum matrix elements in a crystal
I will use atomic units throughout. The Bloch states are formed by the product of a plane wave times a periodic part $|u_{n\mathbf{k}}\rangle$,
\begin{equation}
\langle \mathbf{r} |\psi_{n\mathbf{k}} …
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