WE theorem to evaluate matrix elements

[pollo]

Hi!

In my work I use the WE theorem to evaluate matrix elements. F being the total spin and m the projection onto the z-axis, I am using:

<JIFm|r_(-q)|J'IF'm'>=(-1)^(F'+m'-m)<Fm1q|F'm'>sqrt(2F+1)sixj(F, F', 1:J',J,I)<J'||r||J>

I have a problem with the (-1)^ part which I suspect to be wrong, but have not been able to find a formula to compare a check. Am quite sure the rest is right. Could somebody help and tell what should be in the exponent?

 

[DeShark]

hi!

In my work i use the we theorem to evaluate matrix elements. F being the total spin and m the projection onto the z-axis, i am using:

<jifm|r_(-q)|j'if'm'>=(-1)^{f'+m'-m}<fm1q|f'm'>\sqrt{2f+1}sixj(f, f', 1:j',j,i)<j'||r||j>

i have a problem with the (-1)^ part which i suspect to be wrong, but have not been able to find a formula to compare a check. Am quite sure the rest is right. Could somebody help and tell what should be in the exponent?

I have the theorem as:

&lt;\tau J M|T_q^{(k)}|\tau&#039; J&#039; M&#039;&gt; = {1 \over {\sqrt{2J+1}}}&lt;\tau J ||T^{(k)}||\tau&#039; J&#039;&gt;&lt;J&#039; k M&#039; q| J M&gt;

where &lt;\tau J ||T^{(k)}||\tau&#039; J&#039;&gt; is the reduced matrix element.

Unfortunately I couldn't make head nor tail of the function you're trying to use. Maybe I'll've been of some help. Either way, this has been here for a couple of days with no reply, so maybe this will help the discussion.