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comment Why does a candle blow out when we blow on it? Our breath is 16% oxygen and only 4% CO2
@fibonatic: I watched the video and while I understand that you can relight the candle because the wax vapor is still present in the smoke, I don't get why the flame cleanly falls to the candle wick.
comment What is an effective and efficient way to read research papers?
I don't see any duplication. Reading textbooks is very different from reading a research paper. Generally, textbooks start reasonably from scratch, while papers don't. And if you've ready my question, that's one of the reasons I and many other people at my level find it hard to read papers, but not textbooks.
comment Quantum states as rays as opposed to vectors
Thanks so much for the links to the various papers and reviews!
comment Question about entangled states
thanks! I get it! also, thanks for pointing out that i forgot the square root sign for the normalization factor. i've edited the question.
comment Terms allowed in Lagrangian density
thanks for pointing that out!
comment Terms allowed in Lagrangian density
Thanks for the response! I understand the problem better now. I read Motl's answer and while I understand everything he says from a mathematical perspective, I'm still confused about the physical grounds for his argument. Is it always true that the distance-scale "L" in Motl's answer that appears in the coefficients of the derivative terms is a microscopic scale that can be neglected when you raise it to an integer power? Thanks!
comment Suggestions on a particular arXiv publication on math needed for theoretical physicists
Yes, that was the sense I got yesterday when I was skimming through it, but I just wanted to double-check. Thanks!
comment Suggestions on a particular arXiv publication on math needed for theoretical physicists
I've taken a graduate course in QFT already that used Peskin and Schroeder mostly and sometimes Srednicki. I am interested in QFT applications to condensed matter theory and AdS/CFT correspondence. So, I guess I was looking to improve my understanding of things I've learned as an undergrad from a mathematical point of view. Thanks for your suggestions!
comment How is quantum mechanics compatible with the speed of light limit?
Thanks for the question, Elliotte! In my QFT class, we briefly touched on how the antiparticle field cancels out the superluminal effects of the particle field. But what I don't understand is that the particle still can travel faster than the speed of light. Is there no way one can observe only that? I'm sorry if this is a silly question, I've taken just one semester of QFT..Thanks!