3,026 reputation
921
bio website
location
age
visits member for 3 years, 4 months
seen 5 hours ago

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


Apr
6
comment Would QM be detectable in a all boson universe
*HBT interferometry: en.wikipedia.org/wiki/Hanbury_Brown_and_Twiss_effect
Apr
6
comment Would QM be detectable in a all boson universe
The same way we always detect them: Bose condensation, HBT interferometry*, etc... Of course, as a matter of principle, we and all of our instruments are made of fermions, so we wouldn't be there in the all-boson universe to do the measurements, but QM would be there.
Apr
5
answered Would QM be detectable in a all boson universe
Dec
10
awarded  Yearling
Dec
9
awarded  Nice Question
Nov
17
comment A commutation problem in Hubbard model
Why not calculate the commutator and find out?
Sep
25
awarded  Taxonomist
Aug
21
comment What does “quantum theory forbids promiscuous entanglements” mean?
quantiki.org/wiki/Monogamy_of_entanglement
Aug
1
comment How do I read the simple, but contradictory, Lagrangian ($\mathcal{L} = x + v$)?
yeah, but a bad way to break things is to ignore physics. physics is dimensionally consistent. always.
Jul
31
comment How do I read the simple, but contradictory, Lagrangian ($\mathcal{L} = x + v$)?
well i know you didn't want to hear about your algebraic troubles, but adding a position and a velocity sure as hell won't get you an energy.
Jul
26
comment Where do mass polarization terms come from in many-body Hamiltonian? Why are they sometimes omitted?
This is correct; in fact there are a handful of other wiki pages that refer to "mass polarization terms" that do make explicit that they come from this coordinate transformation. Why on earth anyone would do this for the many-body problem is beyond me.
Jul
25
revised Reconciling topological insulators and topological order
added 1265 characters in body
Jul
17
accepted Reconciling topological insulators and topological order
Jul
14
comment Education : Students devising and solving their own problems
I agree with this 100%. Textbook "drill" exercises only teach you how to solve "drill" exercises (which is an important skill and not to be neglected!) Practicing how to think like a physicist requires spending time thinking like a physicist.
Jul
14
reviewed Approve suggested edit on Topological insulators - Surface states have a phase?
Jul
11
asked Reconciling topological insulators and topological order
Jul
11
comment Topological band structure, difference between a sphere and a donut
@Heidar, actually -- I should probably use this site to its intended purpose and make my own separate "official" question. That way you can also earn points for your answer!
Jul
5
comment Topological band structure, difference between a sphere and a donut
Very nice answer. I'd like to know your thoughts on the following: it seems to me that topological insulators do refer to "topology" in a very real way, but in the sense of connectedness of the single particle Hilbert space of one electron. It is easy to imagine that many-body effects could destroy this. Topological order refers to many-body systems explicitly (therefore more interesting), but the notion of "topology" seems actually less explicit. Is there an easy way to reconcile this?
Jul
5
comment What happens to those electrons of BEC cold atoms?
yeah, i don't know what the accepted answer is going on about, but this is the correct answer. in light of Ken Wilson's recent passing, perhaps we might say that the electrons on the atoms are so deeply bound that they are not present as degrees of freedom in the low energy effective field theory of BEC. ;)
Jun
24
comment Principle of Least Action
It is a principle of stationary action. Perhaps more excitingly, it can also be thought of as a principle of XTREME ACTION!