Confusion about Dirac notation in quantum mechanics
130497
Understanding Dirac's notation
29174
Trouble with operator-sum representation of a quantum operation
107543
What is the difference between a spinor and a vector or a tensor?
88926
Why do we use operators in quantum mechanics?
129463
Confusion about P=VI and V=IR
66945
What exactly does $\dot\sim$ notation mean?
147524
Why is the "canonical momentum" for the Dirac equation not defined in terms of the "gauge covariant derivative"?
41407
How to derive or justify the expressions of momentum operator and energy operator?
122166
Significance of $i$ in the Schrödinger equation
120820
Why, in spin sums, we sum over final spin states and average over initial states?
117387
Can we safely assume $\Psi(x,t) = \psi(x)e^{-i\omega t}$ always in QM?
136184
Why we dont have "direct" velocity operator just as $p$? ( as use $p$ space not $v$? ) in quantum mechanics?
35337
Problem in notation: $(\vec{v}\cdot\vec{\nabla})\vec{v}$ versus $L_v(\vec{v})$
63304
The Dirac-delta function as an initial state for the quantum free particle
131906
"An operator is hermitian". Implications?
36990
Notation of the second derivative - Where does the d go?
91849
Why in the relativistic quantum mechanics $ \gamma_4$ name is not used instead of $ \gamma_5$?