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seen Nov 10 at 3:11

Oct
9
suggested suggested edit on A naive question on the $U(1)$ gauge transformation of electromagnetic field?
Oct
3
comment Mean-field approximation of the disordered state of Heisenberg model
@MarkMitchison Thanks for the explanation on mean-field theory. I am interested in the dynamics, in particular the spin susceptibility. So, I would need something more than a vanishing Hamiltonian.
Oct
3
comment Mean-field approximation of the disordered state of Heisenberg model
@MarkMitchison While the magnetization at each site is zero in the disordered phase, there may still be correlation between different sites. Perhaps such correlation can be used as an order parameter? In any case, I would expect there to be a better approximation than a vanishing Hamiltonian.
Oct
3
awarded  Nice Question
Oct
3
asked Mean-field approximation of the disordered state of Heisenberg model
Oct
1
suggested suggested edit on Angular Momentum Conservation in Gravitational Interaction
Oct
1
asked Hubbard-Stratonovich transformation and mean-field approximation
Sep
7
asked Rate of evaporation of water
Sep
7
revised CHSH Inequality: why $\pi/8$?
tex
Sep
7
suggested suggested edit on CHSH Inequality: why $\pi/8$?
Sep
1
comment Tension on pulleys Physics Question
Could you explain what are you trying to do when you write $\sin 77.32/50 = \sin 12.68/P$?
Aug
26
awarded  Popular Question
Jul
21
reviewed No Action Needed How can we deduce the relation $m = \frac{m_0}{\sqrt{1-\frac{v^2}{c^2}}}$ between relativistic mass and rest mass in special relativity?
Jul
18
comment Pair annihilation - how to generaly solve these types of problems?
It may be helpful to consider the problem in a 2D plane. Then, the momenta of the photons are four unknowns; the conservation of momentum and energy gives three equations. That the photons have the same energy gives the fourth equation. The rest is simply algebra.
Jul
17
comment Pair annihilation - how to generaly solve these types of problems?
What are you trying to solve for?
Jul
11
reviewed Reviewed Maxwell's Equations in curved spacetime
Jul
9
comment Rate of twinkling of stars
How do you calculate the frequency from the size of turbulent elements?
Jul
9
asked Rate of twinkling of stars
Jul
7
reviewed No Action Needed Is it necessary to consume energy to perform computation?
Jul
6
reviewed Reviewed A correct explanation for the levitation of a superconductor above a magnet