Zero-sound density oscillations in Fermi-Bose mixtures

Within a mean field plus random-phase approximation formalism, we investigate the collective excitations of a three-component Fermi-Bose mixture of K atoms, magnetically trapped and subjected to repulsive s-wave interactions. We analyze both the single-particle excitation and the density oscillation...

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Publicado: 2001
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v64_n4_p9_Capuzzi
http://hdl.handle.net/20.500.12110/paper_10502947_v64_n4_p9_Capuzzi
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_10502947_v64_n4_p9_Capuzzi
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spelling paper:paper_10502947_v64_n4_p9_Capuzzi2023-06-08T16:01:57Z Zero-sound density oscillations in Fermi-Bose mixtures Within a mean field plus random-phase approximation formalism, we investigate the collective excitations of a three-component Fermi-Bose mixture of K atoms, magnetically trapped and subjected to repulsive s-wave interactions. We analyze both the single-particle excitation and the density oscillation spectra created by external multipolar fields for varying fermion concentrations. The formalism and the numerical output are consistent with the generalized Kohn theorem for the whole multispecies system. The calculations give rise to fragmented density excitation spectra of the fermion sample and illustrate the role of the mutual interaction in the observed deviations of the bosonic spectra with respect to Stringari’s rule. © 2001 The American Physical Society. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v64_n4_p9_Capuzzi http://hdl.handle.net/20.500.12110/paper_10502947_v64_n4_p9_Capuzzi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Within a mean field plus random-phase approximation formalism, we investigate the collective excitations of a three-component Fermi-Bose mixture of K atoms, magnetically trapped and subjected to repulsive s-wave interactions. We analyze both the single-particle excitation and the density oscillation spectra created by external multipolar fields for varying fermion concentrations. The formalism and the numerical output are consistent with the generalized Kohn theorem for the whole multispecies system. The calculations give rise to fragmented density excitation spectra of the fermion sample and illustrate the role of the mutual interaction in the observed deviations of the bosonic spectra with respect to Stringari’s rule. © 2001 The American Physical Society.
title Zero-sound density oscillations in Fermi-Bose mixtures
spellingShingle Zero-sound density oscillations in Fermi-Bose mixtures
title_short Zero-sound density oscillations in Fermi-Bose mixtures
title_full Zero-sound density oscillations in Fermi-Bose mixtures
title_fullStr Zero-sound density oscillations in Fermi-Bose mixtures
title_full_unstemmed Zero-sound density oscillations in Fermi-Bose mixtures
title_sort zero-sound density oscillations in fermi-bose mixtures
publishDate 2001
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v64_n4_p9_Capuzzi
http://hdl.handle.net/20.500.12110/paper_10502947_v64_n4_p9_Capuzzi
_version_ 1768542702277754880

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