Superfluid states with finite momentum of Cooper pairs in nuclear matter
Superfluid states of symmetric nuclear matter with finite total momentum of Cooper pairs (nuclear LOFF phase) are studied with the use of Fermi–liquid theory in the model with Skyrme effective forces. It is considered the case of four–fold splitting of the excitation spectrum due to finite superfluid mom...
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| Опубліковано в: : | Вопросы атомной науки и техники |
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| Дата: | 2001 |
| Автор: | |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2001
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/80056 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Superfluid states with finite momentum of Cooper pairs in nuclear matter / A.A. Isayev // Вопросы атомной науки и техники. — 2001. — № 6. — С. 370-374. — Бібліогр.: 14 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862746119913603072 |
|---|---|
| author | Isayev, A.A. |
| author_facet | Isayev, A.A. |
| citation_txt | Superfluid states with finite momentum of Cooper pairs in nuclear matter / A.A. Isayev // Вопросы атомной науки и техники. — 2001. — № 6. — С. 370-374. — Бібліогр.: 14 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | Superfluid states of symmetric nuclear matter with finite total momentum of Cooper pairs (nuclear LOFF phase) are studied with the use of Fermi–liquid theory in the model with Skyrme effective forces. It is considered the case of four–fold splitting of the excitation spectrum due to finite superfluid momentum and coupling of T = 0 and T = 1 pairing channels. It has been shown that at zero temperature the energy gap in triplet–singlet (TS) pairing channel (in spin and isospin spaces) for the SkM∗ force demonstrates double–valued behavior as a function of superfluid momentum. As a consequence, the phase transition at the critical superfluid momentum from the LOFF phase to the normal state will be of a first order. Behavior of the energy gap as a function of density for TS pairing channel under increase of superfluid momentum changes from one–valued to universal two–valued. It is shown that two–gap solutions, describing superposition of states with singlet–triplet (ST) and TS pairing of nucleons appear as a result of branching from one–gap ST solution. Comparison of the free energies shows that the state with TS pairing of nucleons is thermodynamically most preferable.
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| first_indexed | 2025-12-07T20:43:52Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-80056 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-12-07T20:43:52Z |
| publishDate | 2001 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Isayev, A.A. 2015-04-09T16:53:12Z 2015-04-09T16:53:12Z 2001 Superfluid states with finite momentum of Cooper pairs in nuclear matter / A.A. Isayev // Вопросы атомной науки и техники. — 2001. — № 6. — С. 370-374. — Бібліогр.: 14 назв. — англ. 1562-6016 PACS numbers: 21.65.+f; 21.30.Fe; 71.10.Ay https://nasplib.isofts.kiev.ua/handle/123456789/80056 Superfluid states of symmetric nuclear matter with finite total momentum of Cooper pairs (nuclear LOFF phase) are studied with the use of Fermi–liquid theory in the model with Skyrme effective forces. It is considered the case of four–fold splitting of the excitation spectrum due to finite superfluid momentum and coupling of T = 0 and T = 1 pairing channels. It has been shown that at zero temperature the energy gap in triplet–singlet (TS) pairing channel (in spin and isospin spaces) for the SkM∗ force demonstrates double–valued behavior as a function of superfluid momentum. As a consequence, the phase transition at the critical superfluid momentum from the LOFF phase to the normal state will be of a first order. Behavior of the energy gap as a function of density for TS pairing channel under increase of superfluid momentum changes from one–valued to universal two–valued. It is shown that two–gap solutions, describing superposition of states with singlet–triplet (ST) and TS pairing of nucleons appear as a result of branching from one–gap ST solution. Comparison of the free energies shows that the state with TS pairing of nucleons is thermodynamically most preferable. The author is grateful for discussions a nd useful comments to S. Peletminsky, G. Roepke, H.-J. Schulze and A. Yatsenko. The financial support of STCU (grant No. 1480) is acknowledged. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Quantum fluids Superfluid states with finite momentum of Cooper pairs in nuclear matter Сверхтекучие состояния с конечным импульсом куперовских пар в ядерной материи Article published earlier |
| spellingShingle | Superfluid states with finite momentum of Cooper pairs in nuclear matter Isayev, A.A. Quantum fluids |
| title | Superfluid states with finite momentum of Cooper pairs in nuclear matter |
| title_alt | Сверхтекучие состояния с конечным импульсом куперовских пар в ядерной материи |
| title_full | Superfluid states with finite momentum of Cooper pairs in nuclear matter |
| title_fullStr | Superfluid states with finite momentum of Cooper pairs in nuclear matter |
| title_full_unstemmed | Superfluid states with finite momentum of Cooper pairs in nuclear matter |
| title_short | Superfluid states with finite momentum of Cooper pairs in nuclear matter |
| title_sort | superfluid states with finite momentum of cooper pairs in nuclear matter |
| topic | Quantum fluids |
| topic_facet | Quantum fluids |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/80056 |
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