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noncommutativegeometry.blogspot.com | ||
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diffxweyl.wordpress.com
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| | | | | Gravity has often been called a gauge theory of the Poincaré or Lorentz group. Here, I develop general relativity in direct analogy to Yang-Mills theory, avoiding geometry entirely1. None of this is original, but I have tried to simplify the presentation compared to the literature, where the similarities and differences between the two theories are... | |
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profmattstrassler.com
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| | | | | Today I continue withmy series of postson fields, strings and predictions. During the 1980s, as I discussed in the previous post in this series, string theorists learned that of all the possible string theories that one could imagine, there were only five that were mathematically consistent. What they learned in the first half of the... | |
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4gravitons.com
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| | | | | As I have mentioned before a theory in theoretical physics can be described as a list of quantum fields and the ways in which they interact. It turns out this is all you need to start drawing Feynman Diagrams. Feynman Diagrams are tools physicists use to calculate the probability of things happening: radioactive particles decaying,... | |
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profmattstrassler.com
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| | | [This post is a continuation of this one from Monday] Coming to Terms Before we continue, a little terminology --- trivial, yet crucial and slightly subtle. Think about the distinction between the words "humanity" and "a human" and "humans"; or "higher education", "university" and "universities"; or "royalty", "king" and "kings". In each case, the three... | ||
