Timeline for Running coupling outside QFT
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 20, 2016 at 16:13 | comment | added | Andrii Magalich | Yes, more or less. Given the specific microscopic coupling to understand the behaviour on large scales, we need to see where the renormalization flow goes. | |
| Jun 20, 2016 at 16:05 | comment | added | Victor Buendía | I read the book and I think I have understood it: there's a running coupling when I change the scale, and this flows towards the fixed points. Is this correct? | |
| Jun 17, 2016 at 11:07 | comment | added | Andrii Magalich | You confuse the fixed points of the renormalization transformation with the values of $J$. The idea that the properties of a critical system are universal and defined by its fixed points. Everything else is governed by renormalization flow. This is the main power of RG. McComb covers these topics in details, I really advise you to look into this book. | |
| Jun 17, 2016 at 10:25 | comment | added | Victor Buendía | Yes, I know about the existence of renormalization gruop, but I would be interested in a particular physics example. In Wikipedia it uses the example of "block of spins" (Ising model?) , and it says that the running coupling $J$ have only three values. Is this really running coupling? Can it be discrete instead of continuous? | |
| Jun 16, 2016 at 22:44 | history | answered | Andrii Magalich | CC BY-SA 3.0 |