- #1
MichPod
- 228
- 45
I am puzzled by the fact that a "single-particle" Hamiltonian (in the annihilation and creation operator form) may be used for a multi-particle case (non-interacting particles) or that (only) a "two-particle" Hamiltonian (in the annihilation and creation operator form) may be used for a multi-particle case of many (pair-) interacting particles.
I'd like to learn more what ideas stay behind this i.e. why a two-particle Hamiltonian may be used so directly for a multiple-particle case. Is it just a coincidence, a trick, or there is some reason/theory/formalism behind this?
I'd like to learn more what ideas stay behind this i.e. why a two-particle Hamiltonian may be used so directly for a multiple-particle case. Is it just a coincidence, a trick, or there is some reason/theory/formalism behind this?