New posts in Quantum Mechanics

Troubles in Dirac's "Principles of quantum mechanics"

What is $\langle H \rangle$ in the infinite square well in the state $|\psi \rangle = | x_0 \rangle$, where $0 \le x_0 \le L$?

What are the necessary and sufficient conditions for a wavefunction to be physically possible?

What does $\exp\left( ax\frac{d}{dx} \right)$ do on $\psi(x)$?

What determines whether or not $|jm\rangle$ can be rotated into $|jm'\rangle$?

How to solve double delta potential bound states by "brute force"

Are all atoms spherically symmetric? If so, why are atoms with half-filled/filled sub-shells often quoted as 'especially' spherically symmetric?

Matrix elements for the particle on a ring

What experiment confirms $\mathbf{J}^2 = \hbar^2 j(j+1)$?

Two different formulas for the calculation of energy in QM