New posts in Hilbert Space

What is wrong with Weyl-Wigner representation?

What do the quantum fields represent, mathematically?

Angular Momentum: How do we know that $\hat{J}_z$ have non-degenerate eigenvalues?

The importance of the phase in quantum mechanics

Non-unique zero function in the function space (Hilbert space)

For $[A,B]=0$, if an eigenfunction of $A$ not an eigenfunction of $B$, does that imply degeneracy of one operator?

Why is the action of lowering operator on the ground state of a harmonic oscillator to give a 0 wave function?

Countable basis of coherent states used to express coherent states

Matrix representation of the operator $\hat{S}_x$ in the standard basis

Parallel / antiparallel spins for two unpaired electrons