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advanced_tools:renormalization_group [2018/04/09 06:42] ronaldwilliams |
advanced_tools:renormalization_group [2018/05/05 12:44] jakobadmin [Concrete] |
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- | **[Y]ou are arranging the theory in such a way that only the right degrees of freedom, the ones that are really relevant to you, are appearing in your equations. I think that this is in the end what the renormalization group is all about.** It's a way of satisfying the Third Law of Progress in Theoretical Physics, which is that //you may use any degrees of freedom you like to describe a physical system, but if you use the wrong ones, you'll be sorry//. | + | You are arranging the theory in such a way that only the right degrees of freedom, the ones that are really relevant to you, are appearing in your equations. I think that this is in the end what the renormalization group is all about. It's a way of satisfying the Third Law of Progress in Theoretical Physics, which is that //you may use any degrees of freedom you like to describe a physical system, but if you use the wrong ones, you'll be sorry//. |
<cite>[[https://www.physics.ohio-state.edu/~ntg/8805/refs/weinberg_rg_good_thing.pdf|Why the Renormalization Group Is a Good Thing]] by Steven Weinberg</cite> | <cite>[[https://www.physics.ohio-state.edu/~ntg/8805/refs/weinberg_rg_good_thing.pdf|Why the Renormalization Group Is a Good Thing]] by Steven Weinberg</cite> | ||
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+ | Here's a plan of how to understand the renormalization group effectively and quickly: | ||
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- First, have a look at http://philosophy.wisc.edu/forster/Percolation.pdf | - First, have a look at http://philosophy.wisc.edu/forster/Percolation.pdf | ||
- Then read http://jakobschwichtenberg.com/renormalization-group-flow/ | - Then read http://jakobschwichtenberg.com/renormalization-group-flow/ | ||
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--> Navier-Stokes Equation# | --> Navier-Stokes Equation# | ||