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seen Nov 10 '11 at 18:49

Feb
16
revised What restricts the value of weak hypercharge from being 5/3?
fixed reference
Feb
16
comment Scale dependence of energy dissipation in viscous flow via AdS/CFT
This answer sounds physically plausible, but I don't see how to relate it to what people actually calculate. In the calculations of the viscosity I have looked at there is no mention of quasinormal modes. One works in Lorentzian signature and imposes boundary conditions at the horizon that only allow incoming modes, that is absorption of the perturbation. Perhaps there is a more complete physical description that includes some of what you say in this answer but this more complete description is not needed to compute the viscosity.
Feb
16
answered What restricts the value of weak hypercharge from being 5/3?
Feb
15
comment Scale dependence of energy dissipation in viscous flow via AdS/CFT
My local hydro guru says the simplest picture is the obvious one of large scale motion turning into heat which is a flow from large scales to small scale microscopic motion, but there are more complicated possibilities which arise in 2d turbulence, in flows in a pipe and so on. So it is not clear to me what to make of the AdS/CFT picture I described. Perhaps someone who has worked on this will eventually show up and have something more useful to say.
Feb
15
answered Number of dimensions in string theory and possible link with number theory
Feb
15
revised Number of dimensions in string theory and possible link with number theory
Changed 17 to 18 since 8*2+2=18, not 17.
Feb
15
comment Scale dependence of energy dissipation in viscous flow via AdS/CFT
I've read about the Kolmogorov description of turbulent flow, but as @Moshe mentioned, I don't understand why we are in the turbulent regime in this problem. What length scale am I supposed to use to define the Reynolds number?
Feb
15
asked Scale dependence of energy dissipation in viscous flow via AdS/CFT
Feb
14
awarded  Nice Answer
Feb
14
answered Question about associative 3-cycles on G2 manifolds
Feb
14
answered Why do string theory and Hopf algebra renormalization seem to have no intersection?
Feb
13
answered Why are neutrino oscillations considered to be “beyond the Standard Model”?
Feb
13
answered Gravitational and gauge-gravitational anomalies in N=1 D=4 supergravity coupled to a SUSY gauge theory with chiral matter
Feb
12
comment What are the alternatives to the Higgs mechanism?
You asked for "all" not "best". There are many alternatives to the simplest model: 2 Higgs fields, 3 Higgs fields ad infinitum; technicolor models; Susy models, top condensate models, little Higgs, Higgsless and so on and so on with hundreds of papers on each topic. This is way too broad a question to expect a short useful answer.
Feb
12
comment What are the alternatives to the Higgs mechanism?
The FAQ says "ask practical, answerable questions based on actual problems that you face." Does your question fit this criterion?
Feb
10
awarded  Citizen Patrol
Feb
9
answered Can pure maths create new theories in physics or does the “idea” ALWAYS come before the math?
Feb
8
comment Why is there a deep mysterious relation between string theory and number theory, elliptic curves, $E_8$ and the Monster group?
I still think a more specific question would be better, but I can see that there might be some interesting and useful answers so I've voted to reopen.
Feb
8
answered Why do physicists believe that there exist magnetic monopoles?
Feb
8
answered How important is the cosmic censorship conjecture?