7,780 reputation
1725
bio website vladimirkalitvianski.wordpres…
location Grenoble, France
age 56
visits member for 4 years, 7 months
seen 6 hours ago

Aug
20
answered Two definitions of Green's function
Aug
15
comment doubts regarding the classical electron radius
There is no justification, as a matter of fact. The electron is point-like and its electrostatic energy is discarded entirely.
Aug
15
answered doubts regarding the classical electron radius
Jul
1
comment Can you depict the electron's electromagnetic field?
"The force now depends on the speed of the particle: you can no longer associate a force to every point of space in a univocal way, so you can't define force lines." - I like it! The electromagnetic force is not a field.
Jun
13
comment Are coherent states of light 'classical' or 'quantum'?
@Bosoneando I know. That is why there they use quote marks and other things in general case.
Jun
12
answered Are coherent states of light 'classical' or 'quantum'?
Jun
10
answered Why does some light escape when in a fiber taper?
Jun
9
comment Can temperature be a complex number?
@CuriousOne: It is the gradient of $T$, not temperature itself who cools down your coffee. And I speak of importance of temperature fluctuations existing in the Nature which may puzzle you if you forget them.
Jun
9
comment Can temperature be a complex number?
Temperature is always an imaginary thing. It is a human average thing exiting in a human imagination. It can be measured as a real number within some precision. The more precision you require, the less certain is the value. It shows its average nature - when different things are taken as the same ones.
Jun
9
comment Photon field interaction
Light in a medium is not the same as the light in vacuum. There is no Faraday effect in vacuum. Medium strongly determines what is light in it.
Jun
8
comment What is the physical interpretation of second quantization?
@ArnoldNeumaier One always quantizes quasi-particles - collective motions of particles: normal modes of compound systems. Even for SHO one can have uncertain number of excitations (quasi-particles) if the energy of a given state $\psi$ is uncertain. It has nothing to do with two constituent particles in SHO.
May
3
answered Which particles can go right through the atom?
May
2
revised Orbital angular momentum of nucleus?
added 9 characters in body
May
2
answered Orbital angular momentum of nucleus?
May
2
comment If an electron tunnels and loses amplitude, but maintains energy; where does the rest of the amplitude go?
Decreasing the barrier increases the probability and does not change the electron energy. Introducing more electrons (by increasing the contact surface, for example) increases the electron flux, not the probability. Flux is a product of the number of tunneling electrons per second, their charge, etc. The probability depends on energy, but the energy after tunneling is the same as before. Presence of the barrier does not subtract the electron energy.
May
2
answered If an electron tunnels and loses amplitude, but maintains energy; where does the rest of the amplitude go?
Apr
30
answered Feynman Lectures: Resonance - Problem with Formula
Apr
18
revised On Elementary Particles
added 19 characters in body
Apr
18
answered On Elementary Particles
Apr
3
comment Quantum anharmonic ocscillator $E_0(\lambda)$ curve or table
An exact curve for $\lambda < 5$ can be found here arxiv.org/pdf/quant-ph/0305128.pdf, Figure 2. Here again, one has to divide the energy and the g-axis by 2 to be coherent with my notations.