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Fluctuation operator and partial wave

  1. May 4, 2015 #1
    Can someone please explain to me why the expression ##[-\Box + U''(\Phi(r))]## is called the fluctuation operator?

    I was also wondering how to derive the following for the ##l^{th}## partial wave of the above operator:

    ##-\frac{d^2}{dr^2}-\frac{3}{r}\frac{d}{dr} + \frac{l(l+2)}{r}+ U''(\Phi(r))##

    Any help would be very helpful.
  2. jcsd
  3. May 9, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
  4. May 10, 2015 #3
    Is it because the the time components of the gauge fields are all eigenvectors of it?
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