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Oct
4
answered What produces String tension in Strings theory?
Oct
3
comment Dilaton field and Scale symmetry breaking
Interesting question. From what I understand, you are asking how SSB of scale symmetry in QFT (by dimensional transmutation) can be seen from the perspective of the dilaton. I wonder if one can do a spurion analysis.
Oct
3
comment Calculate the equivalent resistance between A and B
For more information on how to approach "unbalanced" bridges, check here: ibiblio.org/kuphaldt/electricCircuits/DC/DC_10.html
Oct
3
comment Calculate the equivalent resistance between A and B
This setup is called the Wheatstone bridge. Since the bridge is "balanced" (read he Wikipedia article) there will be no current in the $5 \Omega$ resistor and you can essentially "disconnect" it.
Sep
30
awarded  Explainer
Sep
27
comment What does it mean to “convert energy into time”?
Quite possibly slips between what the scientist intended to say, what was actually said, what was heard by the journalist, what the journalist thought was said, what the journalist expressed that as, in the article and what the editor thought it should be written as.
Sep
27
answered What is the difference between D branes, M branes, and NS branes?
Sep
25
answered Do gravitational fields exist in vacuum region?
Sep
25
comment Do gravitational fields exist in vacuum region?
Defining the notion of "energy" in general relativity is a tricky thing -- en.wikipedia.org/wiki/Mass_in_general_relativity
Sep
21
comment Is the ground state of a QFT always a pure state? And excited states are mixed?
Practical comment: Based on my experience, I would suggest you to be cautious about taking statements at face value, in that line of the literature (EE+holography, etc). I got the feeling that people sometimes overstated the generality of their result which might be based on a very specific computation.
Sep
21
comment Massless integrals in dim-reg
Observation: When the higgs mass is set to zero, the SM is classically scale invariant. So, the question is, can that symmetry be broken quantum mechanically, and if so, will it be suppressed in any manner.
Sep
20
comment Massless integrals in dim-reg
Ah, I see. I don't have a general picture of the kind of applications you're talking about. Some links might help.
Sep
20
answered Mathematical approximation to physics
Sep
20
answered Massless integrals in dim-reg
Sep
20
comment Massless integrals in dim-reg
Btw, scitation.aip.org/content/aip/journal/jmp/15/1/10.1063/… might be of use if you can access it.
Sep
20
revised Unitarity and renormalizability
added 65 characters in body
Sep
20
answered Is the ground state of a QFT always a pure state? And excited states are mixed?
Sep
20
comment Massless integrals in dim-reg
What if I use the "prescription" to regulate the UV first and then regulate the IR (...one problem at a time?)
Sep
20
comment Massless integrals in dim-reg
Could you add links to the 't Hooft-Veltman conjecture, and an example showing the way it's being used?
Sep
20
answered Unitarity and renormalizability