Why do wavefunctions for stationary states include $e^{-iEt/\hbar}$?
117387
Can we safely assume $\Psi(x,t) = \psi(x)e^{-i\omega t}$ always in QM?
103525
Square root of Pauli operators: is there a common convention to define them uniquely?
128932
Is my expansion of the state $| x \rangle$ correct?
87328
Expectation of momentum in the bound state
87423
Why can we treat quantum scattering problems as time-independent?
49617
How does a Wavefunction collapse?
73624
Why is orbital angular momentum quantized according to $I= \hbar \sqrt{\ell(\ell+1)}$?
63304
The Dirac-delta function as an initial state for the quantum free particle
138832
Expansion coefficients of an arbitrary state in the Hilbert space of one-particle states
52935
Do eigenvectors of quantum operators span the whole Hilbert Space?
152528
Bound states in QED
37069
Time-independent Schrödinger function: If the potential $V$ is even, then the wave function $\psi$ can always be taken to be either even or odd
13605
EM wave function & photon wavefunction
103579
Why are the zeroth order terms in degenerate perturbation theory the eigenstates of the perturbing Hamiltonian?
78028
Inexact measurement and wavefunction collapse
17120
Why use Fourier expansion in Quantum Field Theory?
131091
Srednicki's Path Integrals: Ground-State to Ground-State Transition Amplitude in the Presence of a Perturbation