- #1

aaaa202

- 1,169

- 2

If you have an operator a represented in some basis l1>, l2> you find its matrix elements by doing

Aij = <ilAlj>

But more oftenly you are interested in the expectation value of A. So you take:

<ψlAlψ>. My teacher tends to call these numbers matrix elements too. But which matrix element in A is this and how do I realize that? :)

Aij = <ilAlj>

But more oftenly you are interested in the expectation value of A. So you take:

<ψlAlψ>. My teacher tends to call these numbers matrix elements too. But which matrix element in A is this and how do I realize that? :)

Last edited by a moderator: