Discreteness of the general angular momentum in quantum mechanics
1584
Why does spin have a discrete spectrum?
47173
Half-integer eigenvalues of orbital angular momentum
71539
The average of inverse square radius $r^{-2}$ for any state quantum $|n\ell\rangle$ using the radial Schrödinger equation
69031
Square of angular momentum operator in spherical coordinates
55691
Are states of a quantum system represented by vectors in a Hilbert space?
107319
$F=ma$ contest problem on angular momentum
88488
The relationship between angular and linear momentum
156712
Geometrical or Physical significance (interpretation) of the inner-product $\langle A,B \rangle := Trace (AB^t)$ over $M_n(\mathbb R)$
126425
Consistent, complete, and generalized description of the quantum harmonic oscillator
47268
Is all angular momentum quantized?
122357
Discreteness of Spacetime and Violation of Lorentz symmetry
2451
Minimum Uncertainty Wavefunction derivation
42531
Calculating commutators in quantum mechanics symbolically with the help of Mathematica
13137
Why are Hermitian operators linked to observables?
94896
Deriving a QM expectation value for a square of momentum $\langle p^2 \rangle$
81188
$SO(3)$, orbital angular momentum, vector product
41407
How to derive or justify the expressions of momentum operator and energy operator?