Tagged Questions
0
votes
0answers
68 views
Time-dependent perturbation theory [closed]
I am a student looking to understand the question given in the URL.
I understand how to complete earlier parts of this question. But the part I struggle with is figuring out which are the allowed and ...
2
votes
0answers
166 views
Prove that the first order perturbation theory overestimates fundamental state [closed]
This was a question on my exam and I don't know how to solve it.
Use the variational principle to prove that the first order perturbation theory always overestimates the energy of the fundamental ...
2
votes
1answer
103 views
Perturbation method & eigenvalues
I have a problem but I don't understand the question. It says:
"Show that, to first order in energy, the eigenvalues are unchanged."
What does it mean?
It means that if the Hamiltonian has the ...
4
votes
2answers
143 views
Calculating the period of a quasi-circular orbit
In solving an exercise I had to find the equation of the quasi-circular orbits of an object with the potential $V(r)=-\alpha r^{-1-\eta}$ and I expressed it as:
$$r(\phi)=\frac{r_c}{1+\epsilon ...
