- #1
yucheng
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- TL;DR Summary
- See bolded text!
Sakurai, in 5.7.3 Constant Perturbation mentions that the transition rate can be written in both ways:
and
where it must be understood that this expression is integrated with
My question is, what is the advantage of the delta function representation? Which one is actually measured/quoted in experiments?
My guess: we know how to calculate , but we need not know ! Hence it is more convenient to just quote the expression with the delta function.
P.S. does anyone have useful references/reading material of when Fermi's Golden Rule is useful, in experiments, how the transition rates determined experimentally are related to FGR?
Thanks in advance!
(To be frank, I believe all of the confusion regarding FGR is due to the fact it's introduced out of context, i.e. from where it is applied...)
and
where it must be understood that this expression is integrated with
My question is, what is the advantage of the delta function representation? Which one is actually measured/quoted in experiments?
My guess: we know how to calculate
P.S. does anyone have useful references/reading material of when Fermi's Golden Rule is useful, in experiments, how the transition rates determined experimentally are related to FGR?
Thanks in advance!
(To be frank, I believe all of the confusion regarding FGR is due to the fact it's introduced out of context, i.e. from where it is applied...)