7,659 reputation
1725
bio website vladimirkalitvianski.wordpres…
location Grenoble, France
age 56
visits member for 4 years, 4 months
seen 6 hours ago

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
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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.
Apr
1
comment Quantum anharmonic ocscillator $E_0(\lambda)$ curve or table
@LarryHarson: The paper contains the exact values of $E_0$ for $\lambda = 0.05,\, 0.1,\, 0.5,\, 5,\, 50$. The paper notations are somewhat different, and “my” $E_0(\lambda)$ is expressed via "their" $E_0(1,\beta)$ in the following way: $E_0(\lambda)=0.5E_0(1,2\lambda)$. There is also an exact curve for $0\le \lambda\le 1$ in another paper: physics.ucsc.edu/~peter/115/anharmonic.pdf. I used the curve data and $E_0(\lambda=5)$ to plot Fig. 8 on PO (physicsoverflow.org/27226/…)
Mar
31
comment Quantum anharmonic ocscillator $E_0(\lambda)$ curve or table
Thanks, Arnold, it is helpful indeed.
Mar
31
revised Quantum anharmonic ocscillator $E_0(\lambda)$ curve or table
added 2 characters in body
Mar
31
revised Quantum anharmonic ocscillator $E_0(\lambda)$ curve or table
added 12 characters in body; edited title
Mar
31
asked Quantum anharmonic ocscillator $E_0(\lambda)$ curve or table
Mar
8
comment Rutherford's gold foil experiment: can alphas be deflected by electrons vs. nucleus?
@PurposeNation: It is sufficient to know that there is always a thermal-electronic emission from any material, so there are fast electrons, but their amount is small at a room temperature.
Mar
7
answered Rutherford's gold foil experiment: can alphas be deflected by electrons vs. nucleus?
Mar
4
comment Does the need for renormalization in QFT vanish once you use a more fundamental theory (e.g., string theory)?
"It is this removal of sensitive dependence on the microscopic details that underlies the idea of renormalization." I think there may be such theory formulations that do not need this "removal"; see, for example, arxiv.org/abs/1409.8326
Mar
2
answered How do you accelerate atoms/particles?
Feb
27
comment Interpretation of the displacement current
Well, the "displacement current" determines the same quantity - $\nabla\times\mathbf{B}$ - as the current density $\mathbf{j}$ does, so its plase is next to $\mathbf{j}$.
Feb
27
answered Interpretation of the displacement current