Third Order Anharmonic Effects in Many-Body Nuclear Quantum Theory
| Autor: | Sergei Kamerdzhiev, M. I. Shitov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Photon Physics and Astronomy (miscellaneous) Solid-state physics Phonon Anharmonicity 01 natural sciences 010305 fluids & plasmas Third order Amplitude Condensed Matter::Superconductivity Pairing Quantum mechanics 0103 physical sciences Condensed Matter::Strongly Correlated Electrons 010306 general physics Ground state |
| Zdroj: | JETP Letters. 109:69-75 |
| ISSN: | 1090-6487 0021-3640 |
| Popis: | The quantum theory of third order anharmonic effects in the photon production amplitude developed by V.A. Khodel has been generalized for nuclei with pairing and for a more accurate description of low-energy collective phonons. An expression for the transition amplitude between two- and one-phonon states has been obtained. This expression has been compared to the solution of a similar problem considered within the quasiparticle–phonon model. It has been shown that this approach describes a number of new effects, including three- and four-quasiparticle correlations in the ground state (backward-going graphs). |
| Databáze: | OpenAIRE |
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