Density, spin and isospin correlations in low-density two-component Fermi superfluid
Finding the distinct features of the crossover from the regime of large overlapping Cooper pairs to the limit of non-overlapping pairs of fermions (Shafroth pairs) in multi-component Fermi systems remains a topical problem in a quantum many-body theory. Here this transition is studied by calculat...
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| Дата: | 2006 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2006
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| Назва видання: | Физика низких температур |
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| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/120616 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Density, spin and isospin correlations in low-density two-component Fermi superfluid / A.A. Isayev, J. Yang // Физика низких температур. — 2006. — Т. 32, № 10. — С. 1195–1202. — Бібліогр.: 22 назв. — англ. |
Репозитарії
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irk-123456789-1206162017-06-13T03:06:31Z Density, spin and isospin correlations in low-density two-component Fermi superfluid Isayev, A.A. Yang, J. Квантовые жидкости и квантовые кpисталлы Finding the distinct features of the crossover from the regime of large overlapping Cooper pairs to the limit of non-overlapping pairs of fermions (Shafroth pairs) in multi-component Fermi systems remains a topical problem in a quantum many-body theory. Here this transition is studied by calculating the two-body density, spin and isospin correlation functions in dilute two-component Fermi superfluid, taking as an example an infinite system of protons and neutrons (nuclear matter). It is shown that criterion of the crossover (Phys. Rev. Lett. 95, 090402 (2005)), formulated for ultracold fermionic atomic gases and consisting in the change of the sign of the density correlation function at low momentum transfer, fails to describe correctly the density-driven BEC–BCS transition at finite isospin asymmetry or finite temperature. As an unambiguous signature of the BEC–BCS transition, one can use the presence (BCS regime) or absence (BEC regime) of the singularity in the momentum distribution of the quasiparticle density of states. 2006 Article Density, spin and isospin correlations in low-density two-component Fermi superfluid / A.A. Isayev, J. Yang // Физика низких температур. — 2006. — Т. 32, № 10. — С. 1195–1202. — Бібліогр.: 22 назв. — англ. 0132-6414 PACS: 21.65.+f, 21.30.Fe, 71.10.Ay http://dspace.nbuv.gov.ua/handle/123456789/120616 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Квантовые жидкости и квантовые кpисталлы Квантовые жидкости и квантовые кpисталлы |
| spellingShingle |
Квантовые жидкости и квантовые кpисталлы Квантовые жидкости и квантовые кpисталлы Isayev, A.A. Yang, J. Density, spin and isospin correlations in low-density two-component Fermi superfluid Физика низких температур |
| description |
Finding the distinct features of the crossover from the regime of large overlapping Cooper pairs
to the limit of non-overlapping pairs of fermions (Shafroth pairs) in multi-component Fermi systems
remains a topical problem in a quantum many-body theory. Here this transition is studied by
calculating the two-body density, spin and isospin correlation functions in dilute two-component
Fermi superfluid, taking as an example an infinite system of protons and neutrons (nuclear matter).
It is shown that criterion of the crossover (Phys. Rev. Lett. 95, 090402 (2005)), formulated
for ultracold fermionic atomic gases and consisting in the change of the sign of the density correlation
function at low momentum transfer, fails to describe correctly the density-driven BEC–BCS
transition at finite isospin asymmetry or finite temperature. As an unambiguous signature of the
BEC–BCS transition, one can use the presence (BCS regime) or absence (BEC regime) of the singularity
in the momentum distribution of the quasiparticle density of states. |
| format |
Article |
| author |
Isayev, A.A. Yang, J. |
| author_facet |
Isayev, A.A. Yang, J. |
| author_sort |
Isayev, A.A. |
| title |
Density, spin and isospin correlations in low-density two-component Fermi superfluid |
| title_short |
Density, spin and isospin correlations in low-density two-component Fermi superfluid |
| title_full |
Density, spin and isospin correlations in low-density two-component Fermi superfluid |
| title_fullStr |
Density, spin and isospin correlations in low-density two-component Fermi superfluid |
| title_full_unstemmed |
Density, spin and isospin correlations in low-density two-component Fermi superfluid |
| title_sort |
density, spin and isospin correlations in low-density two-component fermi superfluid |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2006 |
| topic_facet |
Квантовые жидкости и квантовые кpисталлы |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/120616 |
| citation_txt |
Density, spin and isospin correlations in low-density
two-component Fermi superfluid / A.A. Isayev, J. Yang // Физика низких температур. — 2006. — Т. 32, № 10. — С. 1195–1202. — Бібліогр.: 22 назв. — англ. |
| series |
Физика низких температур |
| work_keys_str_mv |
AT isayevaa densityspinandisospincorrelationsinlowdensitytwocomponentfermisuperfluid AT yangj densityspinandisospincorrelationsinlowdensitytwocomponentfermisuperfluid |
| first_indexed |
2023-10-18T20:37:29Z |
| last_indexed |
2023-10-18T20:37:29Z |
| _version_ |
1796150686641029120 |