Recent content by Mancho

Yes, I was given V(x)=1/(cosh(x-pi/2))² where 0<x<pi; I had to calculate ground state energy numerically and I got it, as well as eigenvector. then I was simply asked to calculate <V(x)>, but I couldn't get an idea how I could get it without knowing wavefunction. I tried to analytically solve...

I have a question about the last expression, I mean the integral for the expectation value. If we are given potential V(x) and ground state energy E0, and corresponding eigenvector U0 , is it possible to calculate <V(x)> without knowing wavefunction? Another question is: because V(x) is a...

How can I define what is the wavefunction if I'm given eigenvectors V1, V2,...Vn and energies E1, E2,. ..En. I know that it must be a linear combination but how about constants?

Thanks a lot tiny-tim! I guessed from your hint I had to use polar coordinates and it worked great! I got what I was supposed to. Maybe I will upload the solution later when I have time. Thanks again! :)

Homework Statement I'm asked to calculate Green's function's real and imaginary parts. The expression for the given Green's function is: g00=[1-(1-4t2(z-E0)-2)1/2]/2t2(z-E0)-1 (1) Where, z is the complex variable: z= E+iO+ (2) Homework Equations...