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answered Quantum information science references
Dec
10
comment Where can I find the full solutions to Preskill's lecture notes of Physics 219
sorry, where should I post it?
Dec
10
revised Where can I find the full solutions to Preskill's lecture notes of Physics 219
edited tags
Dec
10
asked Where can I find the full solutions to Preskill's lecture notes of Physics 219
Nov
11
asked One loop correction to $F^2$ in massless QED, question from Peskin & Schroeder
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.