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comment Non-covariance of the higher rank propagator (from Weinberg's QFT textbook)
Thank you for your answer, but I need to remember the details of my own question since it was two years ago, I'll get to it as soon as I get some free time.
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comment Noether charge of local symmetries
Took me 2 years to notice this answer, better than mine, +1.
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comment How much merit is there in the heuristic argument of bulk-edge relation for topological insulators?
@EmilProdan, Hi Prof Prodan, thank you for the reference!(I've just heard of your name from Mihai not too long ago:-))
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comment A confusion from Weinberg's QFT text (a vanishing term in Lippmann-Schwinger equation)
@Nogueira, thank you, I'll check it out later,
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Nov
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revised About interchange phase of identical particles in Weinberg's QFT book
deleted 115 characters in body
Nov
27
comment Does the lagrangian contain all the information about the representations of the fields in QFT?
@glance, "why can't I say (or can I?) that Aμ is a spin-1 field for that choice of the Lagrangian?" Yes you definitely can, then the reason to reject (2) becomes the energy bounded below condition, instead of the one Schwartz gave. Qmechanic's comment is right on.
Nov
21
comment Why isn't the path integral defined for non homotopic paths?
+1, informative answer. To nitpick on the terminology, by covering space you actually mean universal covering space.