Timeline for When particle number can change in quantum physics?
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
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| Sep 18, 2016 at 2:10 | comment | added | tparker | @Nogueira I think that's a deep enough issue that it deserves a separate SE question | |
| Sep 18, 2016 at 2:02 | comment | added | Nogueira | The mass, as a central charge of the Galileu álgebra, would not prevent interactions that not conserved particles? | |
| Aug 27, 2016 at 7:43 | history | edited | tparker | CC BY-SA 3.0 |
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| Jul 12, 2016 at 20:04 | vote | accept | CommunityBot | ||
| Jul 11, 2016 at 20:26 | comment | added | user121238 | Interesting. If nothing new shows up I will mark it as the answer. | |
| Jul 11, 2016 at 7:51 | history | edited | tparker | CC BY-SA 3.0 |
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| Jul 11, 2016 at 7:47 | comment | added | tparker | In fact, in my experience, long after you first study QFT, you realize that a lot of the concepts are just advanced concepts from nonrelativistic QM, that ideally you should have mastered before you started studying QFT ... okay, sorry, now I'm just rambling. | |
| Jul 11, 2016 at 7:44 | comment | added | tparker | It's kind of a shame that many people don't encounter indefinite-particle-number Hilbert spaces until they study relativistic QFT. They get the impression that there's something inherently relativistic about the notion. But in fact it's just a practical matter: you don't always need such fancy Hilbert spaces in nonrelativistic contexts, but there's nothing stopping you from using them. | |
| Jul 11, 2016 at 7:36 | history | edited | tparker | CC BY-SA 3.0 |
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| Jul 11, 2016 at 7:31 | comment | added | tparker | TLDR: relativistic system = fundamental particle number not conserved; nonrelativistic system = fundamental particle number conserved, quasiparticle number not (necessarily) conserved. | |
| Jul 11, 2016 at 7:29 | history | answered | tparker | CC BY-SA 3.0 |