Recent content by phdphysics

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    Graduate How to understand the off-diagonal elements

    In quantum mechanics, observable variables are represented by operators, and thus can be replaced by matrix in a certain basis. If we have H|n>=E(n)|n>, where |n> are eigenfunctions of Hamilton matrix. Here is the problem: what's the physical meaning of <m|P|n>, namely off-diagonal elements of...
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    Graduate Can we rewrite Schrodinger equation using observable variable?

    you mean, this equation set(containing two equation, Ψ and Ψ*) does not change? by the way, could you tell me, can Schrödinger equation be rewrited to Ψ·Ψ* mathemetically? thanks
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    Graduate Can we rewrite Schrodinger equation using observable variable?

    We know that in Schrödinger equation, Ψ is called wave function, which is not observable, while Ψ·Ψ* is the probability, which is observable. can we rewirte the Schrödinger equation to a form without Ψ but only Ψ·Ψ*? because I think, in this way can I figure out all conservations in the...
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    Graduate Hg:L-S coupling or j-j coupling?

    Thank you!That database is very useful!
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    Graduate Hg:L-S coupling or j-j coupling?

    When testing Bohr's theory by Franck-Hertz experiment, we have electrons colliding with Hg atoms. a Hg atom will absorb electron's energy when this energy can make it jumping to a higher energy level. I wonder Hg is more like L-S coupling or j-j coupling, for I want to measure its higher...