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DC Field | Value | Language |
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dc.contributor.author | Mazzanti Castrillejo, Ferran | cat |
dc.contributor.author | Polls Martí, Artur | cat |
dc.contributor.author | Fabrocini, A. | cat |
dc.date.accessioned | 2009-10-06T10:21:08Z | - |
dc.date.available | 2009-10-06T10:21:08Z | - |
dc.date.issued | 2003 | cat |
dc.identifier.issn | 1050-2947 | cat |
dc.identifier.uri | http://hdl.handle.net/2445/9573 | - |
dc.description.abstract | The energy and structure of dilute hard- and soft-sphere Bose gases are systematically studied in the framework of several many-body approaches, such as the variational correlated theory, the Bogoliubov model, and the uniform limit approximation, valid in the weak-interaction regime. When possible, the results are compared with the exact diffusion Monte Carlo ones. Jastrow-type correlation provides a good description of the systems, both hard- and soft-spheres, if the hypernetted chain energy functional is freely minimized and the resulting Euler equation is solved. The study of the soft-sphere potentials confirms the appearance of a dependence of the energy on the shape of the potential at gas paremeter values of x~0.001. For quantities other than the energy, such as the radial distribution functions and the momentum distributions, the dependence appears at any value of x. The occurrence of a maximum in the radial distribution function, in the momentum distribution, and in the excitation spectrum is a natural effect of the correlations when x increases. The asymptotic behaviors of the functions characterizing the structure of the systems are also investigated. The uniform limit approach is very easy to implement and provides a good description of the soft-sphere gas. Its reliability improves when the interaction weakens. | eng |
dc.format.extent | 14 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.67.063615 | cat |
dc.relation.ispartof | Physical Review A, 2003, vol. 67, núm. 6, p. 063615. | eng |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevA.67.063615 | - |
dc.rights | (c) The American Physical Society, 2003 | eng |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Matèria condensada tova | cat |
dc.subject.classification | Estadística quàntica | cat |
dc.subject.classification | Mecànica estadística | cat |
dc.subject.classification | Gas de Bose-Einstein | cat |
dc.subject.other | Soft condensed matter | eng |
dc.subject.other | Quantum statistics | eng |
dc.subject.other | Statistical mechanics | eng |
dc.subject.other | Bose-Einstein gas | eng |
dc.title | Energy and structure of dilute hard- and soft-sphere gases | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 511444 | 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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511444.pdf | 171.13 kB | Adobe PDF | View/Open |
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