Upper bound for the grand canonical free energy of the Bose gas in the Gross-Pitaevskii limit
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866918012360065024 |
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| author | Boccato, Chiara Deuchert, Andreas Stocker, David |
| author_facet | Boccato, Chiara Deuchert, Andreas Stocker, David |
| contents | We consider a homogeneous Bose gas in the Gross-Pitaevskii limit at temperatures that are comparable to the critical temperature for Bose-Einstein condensation in the ideal gas. Our main result is an upper bound for the grand canonical free energy in terms of two new contributions: (a) the free energy of the interacting condensate is given in terms of an effective theory describing its particle number fluctuations, (b) the free energy of the thermally excited particles equals that of a temperature-dependent Bogoliubov Hamiltonian. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_19173 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Upper bound for the grand canonical free energy of the Bose gas in the Gross-Pitaevskii limit Boccato, Chiara Deuchert, Andreas Stocker, David Mathematical Physics Quantum Gases 82B10, 81V73, 81V70 We consider a homogeneous Bose gas in the Gross-Pitaevskii limit at temperatures that are comparable to the critical temperature for Bose-Einstein condensation in the ideal gas. Our main result is an upper bound for the grand canonical free energy in terms of two new contributions: (a) the free energy of the interacting condensate is given in terms of an effective theory describing its particle number fluctuations, (b) the free energy of the thermally excited particles equals that of a temperature-dependent Bogoliubov Hamiltonian. |
| title | Upper bound for the grand canonical free energy of the Bose gas in the Gross-Pitaevskii limit |
| topic | Mathematical Physics Quantum Gases 82B10, 81V73, 81V70 |
| url | https://arxiv.org/abs/2305.19173 |