Collisionless and hydrodynamic excitations of trapped boson-fermion mixtures
文献类型：期刊论文
| 作者 | Liu, XJ; Hu, H; Liu, XJ , Univ Florence, European Lab Nonlinear Spect, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy. |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2003 |
| 卷号 | 67期号:2页码:- |
| 关键词 | Quantum Degenerate Bose Time-dependent Traps Einstein Condensate Collective Excitations Zero-temperature Dynamical Stability Frequency-shifts Mixed Condensate Scissors Mode Phase-diagram |
| ISSN号 | 1050-2947 |
| 英文摘要 | Within a scaling ansatz formalism plus Thomas-Fermi approximation, we investigate the collective excitations of a harmonically trapped boson-fermion mixture in the collisionless and hydrodynamic limit at low temperature. Both the monopole and quadrupole modes are considered in the presence of spherical as well as cylindrically symmetric traps. In the spherical traps, the frequency of the monopole mode coincides in the collisionless and hydrodynamic regime, suggesting that it might be undamped in all collisional regimes. In contrast, for the quadrupole mode, the frequency differs largely in these two limits. In particular, we find that in the hydrodynamic regime the quadrupole oscillations with equal bosonic and fermionic amplitudes generate an exact eigenstate of the system, regardless of the boson-fermion interaction. This resembles the Kohn mode for the dipole excitation. We discuss in some detail the behavior of monopole and quadrupole modes as a function of boson-fermion coupling at different boson-boson interaction strength. Analytic solutions valid at weak and medium fermion-boson coupling are also derived and discussed. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000181361200099 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/13363]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Liu, XJ , Univ Florence, European Lab Nonlinear Spect, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy. |
| 推荐引用方式 GB/T 7714 | Liu, XJ,Hu, H,Liu, XJ , Univ Florence, European Lab Nonlinear Spect, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy.. Collisionless and hydrodynamic excitations of trapped boson-fermion mixtures[J]. PHYSICAL REVIEW A,2003,67(2):-. |
| APA | Liu, XJ,Hu, H,&Liu, XJ , Univ Florence, European Lab Nonlinear Spect, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy..(2003).Collisionless and hydrodynamic excitations of trapped boson-fermion mixtures.PHYSICAL REVIEW A,67(2),-. |
| MLA | Liu, XJ,et al."Collisionless and hydrodynamic excitations of trapped boson-fermion mixtures".PHYSICAL REVIEW A 67.2(2003):-. |
入库方式： OAI收割
来源：理论物理研究所
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