Matrix Element

  • Thread starter Nusc
  • Start date
  • #1
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Main Question or Discussion Point

Does anyone know what the formula is for the following:

<j m | S^2_{+} |j m > = ?

Reference to equations in Sakurai would be helpful in deriving the relation. I would suspect 3.5.37 but what about the delta_j j' ?

Does anyone know what I'm talking about?
 

Answers and Replies

  • #2
753
2
3.5.35 a

<j',m|J^2 |j,m> = j(j+1)hbar^2 delta_j j' delta m m'

3.5.37 is

J_+ |j,m> = c_jm^+ |j,m+1>
 
  • #3
Matterwave
Science Advisor
Gold Member
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These appear to be formulas for finding the spin, and or angular momentum, of a wave-function. What is your question exactly?
 
  • #4
753
2
nevermind.
 

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