Why isn't the time-derivative considered an operator in quantum mechanics?
26896
Why can't $ i\hbar\frac{\partial}{\partial t}$ be considered the Hamiltonian operator?
48756
Why are derivatives in interaction terms treated differently from derivatives in the kinetic term?
52198
Why is every selfadjoint operator closed?
18982
Does Quantum Mechanics assume space and time are continuous?
132023
How to derive Schrödinger equation?
104244
Is the Momentum Operator a Postulate?
16786
Is there any case in physics where the equations of motion depend on high time derivatives of the position?
46450
Physical meaning of quantum operators
59004
Why does time evolution operator have the form $U(t) = e^{-itH}$?
36380
Why not use the Lagrangian, instead of the Hamiltonian, in nonrelativistic QM?
150985
Why can't the Klein-Gordon equation explain the hydrogen atom but the Dirac equation does?
41470
Is the density operator a mathematical convenience or a 'fundamental' aspect of quantum mechanics?
147524
Why is the "canonical momentum" for the Dirac equation not defined in terms of the "gauge covariant derivative"?
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
26417
Why do we use Hermitian operators in QM?
41407
How to derive or justify the expressions of momentum operator and energy operator?
661
Basic quantum mechanics- violation of the time-energy uncertainty principle by pure eigenstates of the infinite potential well?