Recent content by jamesmaxwell

Because of hermitian conjugate

I think you know that a particle's state is expressed by ket vector on hilbert space. before we study spin, we think only spatial state is considered But when spin is considered , state is given by not just wave function of spatial part but also internal part called spin. That means just...

I suggest that you refer to textbook. (For example, Griffiths chapter 6) By using perturbation theory, you can calculate approximate energy and fine slit of energy level on same value of L^2. <1/r^2> can be calculated and it's value contains n,l so you may take good quantum number n,l ...

um... Simply speaking, Schrödinger's equation is corresponding to "F=ma" at Newton mechanics. In other word, more difficultly say, it also corresponds to time generation equation at hamilton mechanics. Hamiltonian in Schrödinger's equation undertakes as time transform generator.

I think there is no boundary between Relativity and QM. Any physical thing is both quantum mechnical and relativistic. But in case we analysis an object, for our convenience, we can assume some physical law not follow QM or Relativity but classcial mechnics' laws which are not right more...

If the original wave function is A|11> + B|10> + C|1-1> and it is normalizated, eigenfunction you can get when measurement of Lz is zero is l1 0> I hope my reply help you

Please let me know what lecture I have to previously take. I already took undergraduate level lecture of quantum mechanics and mathematical physics. And I also want to know that perturbation and scattering theory is hardly important on studying QFT..I'm so worry about that I didn't study...