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 Yearling
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comment Fermi surface reconstruction and fermi pockets
The interior of an electron pocket is filled with electrons. The interior of a hole pocket is empty.
Apr
30
comment Cooper pairing from repulsive potential
One can study the problem by looking at the BCS gap equation. When the gap in a one-band system is $k$-independent, the gap equation has a non-trivial solution only when the interaction is attractive. If we allow the gap to be anisotropic, or consider a multiband system, even repulsive interactions can yield a non-trivial solution.
Apr
22
comment Stern-Gerlach experiment with Bosons
related: physics.stackexchange.com/questions/45877/…
Apr
21
comment Bogoliubov transformation with two pairing terms
@LarsMilz, the paper by Suhl et al., Phys. Rev. Lett. 3, 552 (1959) has the solution to the two-band BCS theory. Not sure if this is the same as your problem.
Apr
14
comment Hubbard model within mean-field: three different approaches
You may wish to look at Figure 6.1 of "Condensed matter field theory" by Altland and Simons. It talks about the three decoupling channels by Hubbard-Stratanovich transformation.
Apr
1
comment What is a marginal fermi liquid in a nutshell?
Paper in which marginal Fermi liquid is proposed: Phys. Rev. Lett. 63, 1996 (1989).
Mar
31
revised What do we know about the strength of the electron-phonon coupling in high-temperature superconductors?
fixed typo
Mar
31
suggested approved edit on What do we know about the strength of the electron-phonon coupling in high-temperature superconductors?
Mar
27
comment General properties of Matsubara frequency summations
@EverettYou, I just looked through your Mathematica package, and I am surprised how simple it seems. Could you briefly explain how it works? Typically calculating Matsubara sums by hand is quite a messy endeavor in contour integration for me.
Mar
27
comment How do we determine whether the tight binding model is valid for a material?
I think, in practice, people simply assume that the model works, calculate all its properties, and see to what extent they agree with experiments.
Feb
29
awarded  Yearling
Feb
24
comment Which limit for matsubara frequency sum?
@EverettYou, this is interesting. The sum is very standard, yet I have not seen it discussed like that before. Do you have a reference for this?
Feb
11
awarded  Talkative
Feb
10
comment What will be final velocity of three charges $q$, $q$, $2q$?
@ophelia, your first point is a typo, which I have fixed. Your second point is valid. I believe what I need to show is that $\theta$ actually converges at infinity.
Feb
10
comment What will be final velocity of three charges $q$, $q$, $2q$?
@PeterShor, I have a written a solution below that seems right, but there's something I can't prove. Is there a way to show that the shape of the triangle actually converges at infinity?
Feb
10
revised What will be final velocity of three charges $q$, $q$, $2q$?
fixed typo
Feb
10
comment What will be final velocity of three charges $q$, $q$, $2q$?
@AnubhavGoel, $\theta$ is $\pi/6$ at $t=0$. When $B$ moves, $\theta$ changes.
Feb
10
comment What will be final velocity of three charges $q$, $q$, $2q$?
@Fire, I have updated my solution, but it isn't particularly neat. Do let me know if you find something simpler.
Feb
10
comment What will be final velocity of three charges $q$, $q$, $2q$?
@ophelia, I have included more details in my answer. Note that the numerical result has been corrected. Let me know if you still think something is incorrect.
Feb
10
revised What will be final velocity of three charges $q$, $q$, $2q$?
expanded solution