Динамічні властивості бозе-газу з δ-подібною взаємодією вище температури фазового переходу у границі сильного відштовхування між частинками
Exact equations for the one-particle Green's function and for the irreducible part of the two-particle Green's function of a three-dimensional Bose gas with point-like interaction between particles have been derived in the framework of the functional integral approach. The two-particle spe...
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| Datum: | 2022 |
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| 1. Verfasser: | |
| Format: | Artikel |
| Sprache: | Ukrainian English |
| Veröffentlicht: |
Publishing house "Academperiodika"
2022
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| Schlagworte: | |
| Online Zugang: | https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2022076 |
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| Назва журналу: | Ukrainian Journal of Physics |
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Ukrainian Journal of Physics| Zusammenfassung: | Exact equations for the one-particle Green's function and for the irreducible part of the two-particle Green's function of a three-dimensional Bose gas with point-like interaction between particles have been derived in the framework of the functional integral approach. The two-particle spectrum of the system has been analyzed in detail in the simplest approximation, which makes allowance for all two-particle scattering processes. The leading asymptotics of the single-particle spectrum in the long-wave range was shown to remain quadratic. The critical temperature was found in the limit of strong repulsion between particles. |
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