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Matrix elements are the components, or entries, of a matrix, typically considered in a certain basis.

8 votes

When Eigenfunctions/Wavefunctions are real?

In addition to Emilio's great answer, and in answer to your second question: Specifically in 1D potential problems (i.e. $\hat H = \frac{1}{2m} \hat p^2 + V(\hat x)$), all the bound states can simulta …
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