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New posts in Commutator
Matrix elements for the particle on a ring
Apr 25, 2021
Quantum fields as differential operators
Apr 25, 2021
Common eigenfunctions of commuting operators: case of degeneracy
Apr 25, 2021
How to show that $[L_i, v_j]=i\hbar\sum_k \epsilon_{ijk}v_k$ for any vector $\textbf{v}$ constructed from $\textbf{x}$ and/or $\nabla$?
Apr 25, 2021
Why is this sum the delta function?
Apr 25, 2021
For $[A,B]=0$, if an eigenfunction of $A$ not an eigenfunction of $B$, does that imply degeneracy of one operator?
Apr 25, 2021
Operators "carrying" momentum and particle number
Apr 25, 2021
Why are the commutators for spin taken as postulates?
Apr 25, 2021
Quantum field theory, interpretation of commutation relation
Apr 25, 2021
Symmetry in quantum mechanics
Apr 25, 2021
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