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visits member for 3 years, 8 months
seen Sep 30 at 6:52

As an occupation, I'm a mathematical physicist, studying string theory and quantum field theory.

I've developed as a hobby a few Cocoa (Touch) apps. The largest one so far is spires.app, which manages articles and metadata downloaded from the arXiv eprint server, the inspire database, and the journal websites.

I'm also interested in many other things, which is why I ask questions in various StackExchange sites ...


Aug
18
asked Reflection positivity in general
Jul
16
comment About 2+1 dimensional superconformal algebra
Now that you understand that point, I think you should stop asking and think for several days by yourself. Good luck!
Jul
16
comment About 2+1 dimensional superconformal algebra
You need to distinguish two questions: what is the representation of the supercharge and what is the representation of the quantum states the supercharge is acting on. In order to get the inequality you're interested, you need to consider the latter question. You can't fix $I$ to be $N\times N$ and $M_{\mu\nu}$ to be $2\times 2$. They depend on $h$ and $j$. You try extracting $j$ from the $M_{\mu\nu}$ you already fixed, but that's not the point. $j$ depends on the quantum states.
Jul
14
comment About 2+1 dimensional superconformal algebra
2) Right. 3) The author didn't say Gamma are all real, he just said sigma is real. 4) You need to understand that the matrices M are determined by j and that the metrices $I$ are detemined by h.
Jul
14
comment About 2+1 dimensional superconformal algebra
1) The right matrices to use depend on the quantum states. What you wrote down is not OK even in a single superconformal multiplet. How did you determine which matrix representations of SO(N) and SO(2,1) to use?
Jul
13
answered About 2+1 dimensional superconformal algebra
May
4
awarded  Enlightened
May
4
awarded  Nice Question
May
4
awarded  Yearling
May
4
awarded  Nice Question
May
4
awarded  Nice Question
May
4
awarded  Nice Answer
May
4
awarded  Commentator
May
4
awarded  Nice Question
May
4
awarded  Nice Answer
Jan
2
comment General Relativity research and QFT in curved spacetime
@Kyle: That's also an interesting subject, but I meant this type of things: arxiv.org/abs/0905.4352
Dec
29
answered General Relativity research and QFT in curved spacetime
Dec
29
comment Wilson/Polyakov loops in Weinberg's QFT books
I don't know if it's in it or not (look for "area law" or "confinement" in it). Note that you and I may think this topic as classic, but I guess it can be too modern a topic for him. Anyway, just stop regarding his book as sacred.
Dec
28
answered Wilson/Polyakov loops in Weinberg's QFT books
Dec
16
comment On the Coulomb branch of N=2 supersymmetric gauge theory
Well, anything which was done in the last century should be considered basic. The SUSY textbook by Terning covers basic stuffs pretty well.