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http://hdl.handle.net/2445/9577
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DC Field | Value | Language |
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dc.contributor.author | Grasso, Marcella | cat |
dc.contributor.author | Urban, Michael | cat |
dc.contributor.author | Viñas Gausí, Xavier | cat |
dc.date.accessioned | 2009-10-06T10:27:30Z | - |
dc.date.available | 2009-10-06T10:27:30Z | - |
dc.date.issued | 2005 | cat |
dc.identifier.issn | 1050-2947 | cat |
dc.identifier.uri | http://hdl.handle.net/2445/9577 | - |
dc.description.abstract | We investigate the "twist" mode (rotation of the upper against the lower hemisphere) of a dilute atomic Fermi gas in a spherical trap. The normal and superfluid phases are considered. The linear response to this external perturbation is calculated within the microscopic Hartree-Fock-Bogoliubov approach. In the normal phase the excitation spectrum is concentrated in a rather narrow peak very close to the trapping frequency. In the superfluid phase the strength starts to be damped and fragmented and the collectivity of the mode is progressively lost when the temperature decreases. In the weak-pairing regime some reminiscence of the collective motion still exists, whereas in the strong-pairing regime the twist mode is completely washed out. The disappearance of the twist mode in the strong-pairing regime with decreasing temperature is interpreted in the framework of the two-fluid model. | eng |
dc.format.extent | 7 p. | cat |
dc.format.mimetype | application/pdf | eng |
dc.language.iso | eng | eng |
dc.publisher | The American Physical Society | eng |
dc.relation.isformatof | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevA.71.013603 | cat |
dc.relation.ispartof | Physical Review A, 2005, vol. 71, núm. 1, p. 013603. | eng |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevA.71.013603 | - |
dc.rights | (c) The American Physical Society, 2005 | eng |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Matèria condensada | cat |
dc.subject.classification | Estructura nuclear | cat |
dc.subject.classification | Models nuclears | cat |
dc.subject.classification | Gas d'electrons | cat |
dc.subject.classification | Teoria de l'aproximació | cat |
dc.subject.other | Condensed matter | eng |
dc.subject.other | Nuclear structure | eng |
dc.subject.other | Nuclear models | eng |
dc.subject.other | Electron gas | eng |
dc.subject.other | Approximation theory | eng |
dc.title | Microscopic description of the twist mode in normal and superfluid trapped Fermi gases | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 520010 | cat |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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520010.pdf | 81.85 kB | Adobe PDF | View/Open |
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