I know what was confusing me: in first quantization ψ it's not an operator, it doesn't have sense to speak about commutation, while in second quantization it is, and I was reading the later before the former...
Thanks!
Thanks, I was long suspecting that at this stage, but I still can't find where to read about that with more detail. I hope that for the Schrödinger equation is just the same.
It happened to me once but it worked after trying again, it's page 93 of An Introduction to Advanced Quantum Physics, by...
Thanks for your answer, but my doubts are just the same, I don't see why "the first and third terms on the right cancel", or why "the m2 terms on the right cancel out", since I assume ψ and ψ* do not commute... or if the solutions on the second case I mentioned are valid, and why.
Hi, I would appreciate some help with this issue: I want to calculate the probability denstities and currents from the Schrödinger and Klein-Gordon equations, and I've found 2 ways so far, the one that gives the "standard" result (the one I've seen on my course, or wikipedia) but I don't...