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Graduate student in the arcane arts of cond-mat theory. (Perhaps theory is too strong a word -- make that numerics... :)


Apr
27
comment Time Reversal Bulk Hamiltonian
The thing sandwiched between $\mathcal{T}$s in your last equation should've been $H_{2}(-k)$ (this is how you get a -k in the upper left value in your matrix! Otherwise the equality as written just isn't true.) and then it's trivially a special case of the first line.
Apr
10
comment On the Bogoliubov transformation in the BCS
You're on the right track, but notice that the RHS of the transformations contain no spin indices. So flipping the spin in the first expression doesn't mean anything. Inverting momentum is the only trick you've got.
Feb
23
awarded  Notable Question
Jan
12
awarded  Revival
Dec
10
awarded  Yearling
Nov
22
awarded  Nice Answer
Oct
13
answered What is the clear cut difference between isotropic and anisotropic spin exchanges?
Sep
24
awarded  Autobiographer
Aug
24
answered Why is the Hubbard model written down so late?
Aug
24
comment Atomic nearest neighbor notation
It wouldn't make a damn lick of sense, but I have seen the notation NN, NNN, etc. referring to two-nucleon, three-nucleon, etc. interactions in an EFT context. Otherwise I've definitely seen both notations in condensed matter, with the NN,2NN,3NN,etc... notation being much more common.
Jun
30
awarded  Popular Question
Jun
10
reviewed Approve Newton and the change of mass with time
Jun
9
reviewed Approve What is the duration of a snap?
Jun
9
reviewed Approve What happens when work function = hf
Jun
8
reviewed Approve Calculating probability current for scattering problem
Jun
1
reviewed Approve Omega-frequency or pulsation?
Jun
1
reviewed Approve Kane and Mele's argument on the existence of edge states in quantum spin Hall effect of graphene
May
27
answered Hamiltonian for the Periodic Kitaev Model
Apr
27
comment Is $\frac{\partial}{\partial \Phi(y)} \Phi (x) = \delta(x-y)$ correct?
This is a basic property of "functional derivatives" though usually a $\delta$ symbol is used instead of the partial derivative $\partial$. Wikipedia isn't the worst resource for this: en.wikipedia.org/wiki/…
Apr
6
comment Would QM be detectable in a all boson universe
*HBT interferometry: en.wikipedia.org/wiki/Hanbury_Brown_and_Twiss_effect