Timeline for What exactly is the difference between a quasiparticle and composite particle in QFT/particle physics?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Jan 18, 2023 at 4:16 | comment | added | hft | A non-relativistic particle has a hamiltonian like this: $\sum_p \frac{p^2}{2m}c_p^\dagger c_p$. A quasi-particle has a hamiltonian like this: $\sum_p \epsilon(\vec p) c_p^\dagger c_p$, where $\epsilon(\vec p)$ is not $p^2/2m$. | |
| Jan 18, 2023 at 4:14 | comment | added | Mikayla Eckel Cifrese | OK, so then what's the difference? Like, what's the actual DEFINITION of "particle" that quasiparticles don't satisfy? | |
| Jan 18, 2023 at 4:14 | comment | added | Mikayla Eckel Cifrese | Not me, no, although it seems sort of rude to ask. | |
| Jan 18, 2023 at 4:13 | comment | added | hft | "Isn't it all just waves in quantum fields interfering with each other?" Sure. | |
| Jan 18, 2023 at 4:12 | comment | added | Mikayla Eckel Cifrese | What's the difference between a "bound state" of elementary particles and a superposition of interacting particles? Isn't it all just waves in quantum fields interfering with each other? | |
| Jan 18, 2023 at 4:12 | history | edited | hft | CC BY-SA 4.0 |
added 350 characters in body
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| Jan 18, 2023 at 4:05 | history | answered | hft | CC BY-SA 4.0 |