Timeline for Definition of Free field or Noninteracting field
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
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| Feb 26, 2013 at 10:33 | comment | added | Vladimir Kalitvianski | @LubošMotl: Yes, that's right. One can say they are free from "self-action" interaction. | |
| Feb 26, 2013 at 10:25 | comment | added | Luboš Motl | Well, except that if you place an electron in an external - classical - field (electromagnetic, gravitational, or another), QFT describes it by a bilinear Lagrangian that we would still call free, wouldn't we? So the quanta of free fields aren't necessarily particles unaffected by external fields/forces. They may be very well affected. In QFT, the "freedom" means that the fields don't interact with other (or the same) quantum fields but they're allowed to be affected by the classical background. | |
| Feb 26, 2013 at 10:22 | history | answered | Vladimir Kalitvianski | CC BY-SA 3.0 |