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https://hdl.handle.net/2445/9554
Title: | Beyond the Gross-Pitaevskii approximation: Local density versus correlated basis approach for trapped bosons |
Author: | Fabrocini, A. Polls Martí, Artur |
Keywords: | Estadística quàntica Constitució de la matèria Ionització Excitació nuclear Quantum statistics Constitution of matter Ionization Nuclear excitation |
Issue Date: | 1999 |
Publisher: | The American Physical Society |
Abstract: | We study the ground state of a system of Bose hard-spheres trapped in an isotropic harmonic potential to investigate the effect of the interatomic correlations and the accuracy of the Gross-Pitaevskii equation. We compare a local density approximation, based on the energy functional derived from the low density expansion of the energy of the uniform hard sphere gas, and a correlated wave function approach which explicitly introduces the correlations induced by the potential. Both higher order terms in the low density expansion, beyond Gross-Pitaevskii, and explicit dynamical correlations have effects of the order of percent when the number of trapped particles becomes similar to that attained in recent experiments. |
Note: | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevA.60.2319 |
It is part of: | Physical Review A, 1999, vol. 60, núm. 3, p. 2319-2323. |
URI: | https://hdl.handle.net/2445/9554 |
Related resource: | http://doi.org/10.1103/PhysRevA.60.2319 |
ISSN: | 1050-2947 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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