Zero-sound density oscillations in Fermi-Bose mixtures

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 spec...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2001
Materias:
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
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v64_n4_p436071_Capuzzi
http://hdl.handle.net/20.500.12110/paper_10502947_v64_n4_p436071_Capuzzi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_10502947_v64_n4_p436071_Capuzzi
record_format dspace
spelling paper:paper_10502947_v64_n4_p436071_Capuzzi2023-06-08T16:01:57Z Zero-sound density oscillations in Fermi-Bose mixtures 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 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. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v64_n4_p436071_Capuzzi http://hdl.handle.net/20.500.12110/paper_10502947_v64_n4_p436071_Capuzzi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 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
spellingShingle 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
Zero-sound density oscillations in Fermi-Bose mixtures
topic_facet 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
description 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.
title 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_p436071_Capuzzi
http://hdl.handle.net/20.500.12110/paper_10502947_v64_n4_p436071_Capuzzi
_version_ 1768544145389912064

Ejemplares similares