In a previous thread a member asked a question about the following probability formula <Ψ(adsbygoogle = window.adsbygoogle || []).push({}); _{E}|P|Ψ_{g}>

I would like to exploit his formula to ask some very basic questions about the meaning of this formula.

Here are my questions....

1. Is | Ψ_{g}> the wave function for the ground state of the system?

1a. Looked at in terms of simple linear algebra, is it just a column vector?

1b. What does each element in the column vector represent?

2. When you operate on the ground state with the momentum operator, as in P|Ψ_{g}>, is the result another column vector?

2a. What do the elements of that column vector represent?

3. In terms of linear algebra, what does the following Dirac notation mean.... |A,B>?

I may have more questions...

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# I Some simple questions about <Ψ|P|Ψ>

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