Zero-sound density oscillations in Fermi-Bose mixtures
Zero-sound density oscillations in Fermi-Bose mixtures
复制标题
费米-玻色混合物中的零声密度振荡
DOI：
10.1103/physreva.64.043607
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发表时间：
2001
影响因子：
2.9
通讯作者：
E. Hernández
中科院分区：
文献类型：
--
作者：
P. Capuzzi;E. Hernández
在一个平均场加随机相位近似的形式主义，我们调查的集体激发的三个组件的费米-玻色混合的K原子，磁捕获和排斥的s波相互作用。我们分析了单粒子激发和密度振荡谱由外部多极场，不同的费米子浓度。对于整个多种群系统，其形式和数值结果与广义Kohn定理是一致的。计算产生碎片的密度激发光谱的费米子样品和说明的作用的相互作用中观察到的偏差的玻色子光谱相对于Stringari的规则。
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.