Artículo
Capuzzi, P.; Hernández, E.S. "Zero-sound density oscillations in Fermi-Bose mixtures" (2001) Physical Review A. Atomic, Molecular, and Optical Physics. 64(4):436071-436079
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Abstract:
The collective excitations of a three-component Fermi-Bose mixture of potassium atoms magnetically trapped and subjected to repulsive s-wave interactions was analyzed using the mean-field plus random-phase approximation (RPA) formalism. The single-particle excitation and the density oscillation spectra created by external multipolar fields was studied for varying fermion concentrations. When the bosonic cloud was large, the low-lying modes increased with a smaller slope than the modes with energies higher than the chemical potential. The fragmented density excitation spectra of the fermion sample was evaluated which illustrated the role of mutual interaction in the observed deviations of the bosonic spectra with respect to Stringari's rule.
Registro:
| Documento: | Artículo |
| Título: | Zero-sound density oscillations in Fermi-Bose mixtures |
| Autor: | Capuzzi, P.; Hernández, E.S. |
| Filiación: | Departamento de Física, Facultad de Cie. Exactas y Naturales, Universidad de Buenos Aires, RA-1428 Buenos Aires, Argentina |
| Palabras clave: | Approximation theory; Eigenvalues and eigenfunctions; Electron transitions; Electron traps; Fermi level; Hamiltonians; Harmonic analysis; Isotopes; Magnetic field effects; Mathematical models; Mixtures; Particle beam dynamics; Perturbation techniques; Potassium; Wave plasma interactions; Density fluctuations; Quasiparticles; Random-phase approximations (RPA); Trapping potentials; Fermions |
| Año: | 2001 |
| Volumen: | 64 |
| Número: | 4 |
| Página de inicio: | 436071 |
| Página de fin: | 436079 |
| Título revista: | Physical Review A. Atomic, Molecular, and Optical Physics |
| Título revista abreviado: | Phys Rev A |
| ISSN: | 10502947 |
| CODEN: | PLRAA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v64_n4_p436071_Capuzzi |
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Citas:
---------- APA ----------
Capuzzi, P. & Hernández, E.S. (2001) . Zero-sound density oscillations in Fermi-Bose mixtures. Physical Review A. Atomic, Molecular, and Optical Physics, 64(4), 436071-436079.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v64_n4_p436071_Capuzzi [ ]
---------- CHICAGO ----------
Capuzzi, P., Hernández, E.S. "Zero-sound density oscillations in Fermi-Bose mixtures" . Physical Review A. Atomic, Molecular, and Optical Physics 64, no. 4 (2001) : 436071-436079.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v64_n4_p436071_Capuzzi [ ]
---------- MLA ----------
Capuzzi, P., Hernández, E.S. "Zero-sound density oscillations in Fermi-Bose mixtures" . Physical Review A. Atomic, Molecular, and Optical Physics, vol. 64, no. 4, 2001, pp. 436071-436079.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v64_n4_p436071_Capuzzi [ ]
---------- VANCOUVER ----------
Capuzzi, P., Hernández, E.S. Zero-sound density oscillations in Fermi-Bose mixtures. Phys Rev A. 2001;64(4):436071-436079.Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v64_n4_p436071_Capuzzi [ ]
