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Jul
2
awarded  Curious
Apr
29
awarded  Yearling
Apr
5
awarded  Revival
Mar
1
comment Fermion boundary conditions at finite temperature
The relation $ \rm{Tr} ~e^{-\beta \hat{H}} \hat{\psi}(x,\tau_1)\hat{\psi}(y.0) =\rm{Tr} ~e^{-\beta \hat{H}}\hat{\psi}(y.\beta) \hat{\psi}(x,\tau_1)$ shoud hold which is just the KMS relation. I use the cyclicity of the trace rather than exchange the fermion operators.
Dec
18
revised Matrix integral in multi-matrix model
edited tags
Dec
11
comment Matrix integral in multi-matrix model
@Qmechanic, I am very sorry for this. What should I do? Delete some of them? or...
Dec
11
asked Matrix integral in multi-matrix model
Dec
10
comment A Puzzle about $SO(3)$
Thanks for your patience.
Dec
9
accepted A Puzzle about $SO(3)$
Dec
9
comment A Puzzle about $SO(3)$
It is a little weird for me. $SO(3)$ and $SU(2)$ have the same algebra while this algebra has different representations for each. May I infer that the representation of the algebra contains the information of its group which is not known from the algebra itself?
Dec
8
comment Moduli Space of $\mathcal{N}=4$ SYM on $\mathbb{R} \times S^3$
CFT on $R\times S^3$ is still conformal. It is similar to world sheet radial quantization. The radius $S^3$ can be rescaled out by conformal invariance. More argument can be found in hep-th/9803131.
Dec
8
comment A Puzzle about $SO(3)$
From $SO(3)$ piont of view, $\varepsilon$ is also generator, so it is also fundamental rep. ?
Dec
7
revised A Puzzle about $SO(3)$
added 29 characters in body
Dec
7
asked A Puzzle about $SO(3)$
Dec
5
comment Two particles in infinite square potential
Thanks for comments. Maybe it is not a good question.
Dec
5
revised Two particles in infinite square potential
edited title
Dec
4
revised Two particles in infinite square potential
added 14 characters in body; edited title
Dec
4
asked Two particles in infinite square potential
Nov
28
comment The commutator of scalar field
Refer to Srednicki QFT Formula (4.12) and problem 4.1.
Nov
28
comment Why are rockets so big?
I do not think it is a qestion about physics.