meta user
network profile
| bio | website | |
|---|---|---|
| location | ||
| age | 24 | |
| visits | member for | 1 year, 3 months |
| seen | Mar 17 at 15:16 | |
| stats | profile views | 27 |
|
Oct 30 |
answered | Formal demonstration that minimizing the free energy equals maximizing the entropy |
|
Sep 2 |
comment |
Relation between statistical mechanics and quantum field theory So in order to understand statistical mechanics I don't need any deep understanding in QFT (a basic course of many body should be fine). What about conformal field theory? Is it necessary? en.wikipedia.org/wiki/Conformal_field_theory |
|
Aug 29 |
asked | Relation between statistical mechanics and quantum field theory |
|
Jul 10 |
awarded | Supporter |
|
Jul 8 |
answered | is there any difference between these Differential $dx^2$ and $(dx)^2$? |
|
Jul 7 |
comment |
Friction at zero temperature? Sorry, what you say is true also because on average over time the surface is flat. |
|
Jul 7 |
answered | Friction at zero temperature? |
|
Jun 20 |
revised |
Analogy between magnetic bottle and Van Allen's radiation belt edited tags |
|
Jun 18 |
awarded | Scholar |
|
Jun 18 |
accepted | Equivalent system in Centre manifold theory |
|
Jun 18 |
comment |
Analogy between magnetic bottle and Van Allen's radiation belt I had in mind something like this and now i have a clearer view. Thanks! In the van allen's case i think that a revolutionary motion by charged particles around the earth is also possible since the particle can have a velocity tangent to surfaces of equal magnetic field (like the one that appear at the end of the video, tangent horizontally youtube.com/watch?v=6CpNOu4l1dM) see also point 3 in this website phy6.org/Education/wtrap1.html |
|
Jun 17 |
asked | Analogy between magnetic bottle and Van Allen's radiation belt |
|
May 14 |
revised |
Qualitative argument to determine energy of defects added 2 characters in body |
|
May 14 |
revised |
Qualitative argument to determine energy of defects added 257 characters in body |
|
May 14 |
asked | Qualitative argument to determine energy of defects |
|
Apr 27 |
comment |
Equivalent system in Centre manifold theory I think you gave an elegant explanation. I thought about it and i would ask you if my reworking of your answer is fine. Look at eq. 5.55 page 176 Kutztnetsov. It's just an example of diagonalization in case of Hopf's bifurcation. Since we are looking for a tangent plane his dimensionality is lower than the one of the initial system. So when i taylor expand near the origin, chosen as the critical point, y=0 and it disappears from the taylor expansion. So what remains is a function of the other variables. |
|
Apr 10 |
comment |
Equivalent system in Centre manifold theory what do you mean by "marginal directions" ? |
|
Apr 3 |
revised |
Power laws and deterministic systems added 324 characters in body |
|
Apr 3 |
comment |
Power laws and deterministic systems As far as i know you can prove the H theorem using only boltzmann equation which can be proved in hard sphere approximation. A classical gas confined in a half of a box naturally expands when you let the particles go in the other half, for example removing a barrier. Of course you can derive classical mechanics in the limit h->0. But i suggest you to first study statistical mechanics from a classical point of view because some concepts change a little. Temperature is approximated as the mean kinetic energy: so T=0 -> E=0. But in a quantum harmonic oscillator E is never 0 also for n=0. So T=0? |
|
Apr 3 |
answered | Power laws and deterministic systems |
