Finite-temperature excitations of a trapped Bose-Fermi mixture
文献类型：期刊论文
| 作者 | Liu, XJ; Hu, H; Liu, XJ , Univ Florence, LENS, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy. |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2003 |
| 卷号 | 68期号:3页码:- |
| 关键词 | Einstein Condensation Collective Excitations Gas Dynamics Atoms |
| ISSN号 | 1050-2947 |
| 英文摘要 | We present a detailed study of the low-lying collective excitations of a spherically trapped Bose-Fermi mixture at finite temperature in the collisionless regime. The excitation frequencies of the condensate are calculated self-consistently using the static Hartree-Fock-Bogoliubov theory within the Popov approximation. The frequency shifts and damping rates due to the coupled dynamics of the condensate, noncondensate, and degenerate Fermi gas are also taken into account by means of the random-phase approximation and linear-response theory. In our treatment, the dipole excitation remains close to the bare trapping frequency for all temperatures considered, and thus is consistent with the generalized Kohn theorem. We discuss in some detail the behavior of monopole and quadrupole excitations as a function of the Bose-Fermi coupling. At nonzero temperatures we find that, as the mixture moves towards spatial separation with increasing Bose-Fermi coupling, the damping rate of the monopole (quadrupole) excitation increases (decreases). This provides us a useful signature to identify the phase transition of spatial separation. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000185716700100 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/13228]  |
| 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, LENS, 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, LENS, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy.. Finite-temperature excitations of a trapped Bose-Fermi mixture[J]. PHYSICAL REVIEW A,2003,68(3):-. |
| APA | Liu, XJ,Hu, H,&Liu, XJ , Univ Florence, LENS, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy..(2003).Finite-temperature excitations of a trapped Bose-Fermi mixture.PHYSICAL REVIEW A,68(3),-. |
| MLA | Liu, XJ,et al."Finite-temperature excitations of a trapped Bose-Fermi mixture".PHYSICAL REVIEW A 68.3(2003):-. |
入库方式： OAI收割
来源：理论物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。