7,235 reputation
1623
bio website vladimirkalitvianski.wordpres…
location Grenoble, France
age 56
visits member for 3 years, 11 months
seen 1 hour ago

Dec
18
revised Angular momentum needn't always change in multiples of $\hbar$?
added 3 characters in body
Dec
18
answered Angular momentum needn't always change in multiples of $\hbar$?
Dec
15
comment Half integer eigenvalues of orbital angular momentum
Here there is no "should", there is "why not?".
Dec
13
comment Can a quantum field be understood as a superposition of all particles' wave functions?
In my opinion, it is a matter of definition. We define quantum fields, find out their equations and use them to calculate the occupation number evolutions.
Dec
13
comment Can a quantum field be understood as a superposition of all particles' wave functions?
No, a quantum field is a superposition of operators ;-)
Dec
13
answered Need of vector potential in quantum mechanics
Dec
11
awarded  Mortarboard
Dec
6
comment Deriving Maxwell's Equations from Electromagnetic Tensor
Exactly. For a static case it is reduced to the gradient.
Dec
6
answered Deriving Maxwell's Equations from Electromagnetic Tensor
Dec
6
comment Is QED valid for arbitrarily short length scale?
@ACuriousMind: All theories are incomplete, but it does not mean they must have calculation problems: arxiv.org/abs/1409.8326
Dec
3
answered Why do or don't neutrinos have antiparticles?
Dec
2
comment Must flow be supersonic for disturbances not to affect upstream?
I do not know about oil properties, so I cannot answer. And I would compare propagation of a wave front with the local velocity.
Dec
1
answered Must flow be supersonic for disturbances not to affect upstream?
Dec
1
comment Physical Explanation of the steady state in RC circuits
Yes, it does. Because the current (instant) voltage $V(t)$ can be "initial" for another problem.
Dec
1
answered Physical Explanation of the steady state in RC circuits
Nov
30
comment QFT propagator, time reversal and the Born rule
A particle propagation is space-like?
Nov
29
awarded  Nice Answer
Nov
28
answered Centrifugal force in the Hydrogen atom for $L=0$
Nov
28
revised Eigenstates of Spin
Put $s to LateX.
Nov
28
comment “Slightly off-shell”?
Isn't this propagator behavior gauge-dependent?