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location Grenoble, France
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1h
revised On Elementary Particles
added 19 characters in body
3h
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
Feb
27
revised Size of hydrogenic atoms
added 248 characters in body
Feb
27
revised Size of hydrogenic atoms
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Feb
26
revised Size of hydrogenic atoms
added 529 characters in body
Feb
23
answered Size of hydrogenic atoms
Feb
14
answered The strange thing about the maximum in Planck's law
Feb
10
comment Born-Oppenheimer Approximation equivalent to Tensor-product ?
@MaksimZholudev: I do not understand what a product of Hilbert spaces is in case of two particles couled with a spring. What are the "wave functions" of the constituent particles?