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3 questions
0votes
2answers
605views
Defined Momentum vs. Defined $k$
In quantum mechanics usually we write the momentum operator $\hat{p}$ as: $$\hat{p} = \hbar \hat{k}. \tag{1}$$ with of course: $$\hat{p}|p\rangle = p |p\rangle \tag{2}$$ $$\hat{k}|k\rangle=k|k\rangle \...
- 4,683
4votes
3answers
1kviews
Can momentum never be zero in quantum mechanics?
I have seen Zetilli's QM book deals with $E>V$ and $E< V$ (tunnelling) in case of the potential wells deliberately avoiding the E=V case, so I thought maybe something is intriguing about this ...
- 1,108
0votes
1answer
826views
Wave-Function Normalization in Momentum Space Not Possible
Hello, I just have a question about this passage; specifically, I do not understand why the result of the inner product (the integral of u_k* and u_k') being the delta function defies conventional ...
