| Landau Damping of Collective Modes in a Disc-Shaped Bose-Einstein Condensate |
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| 引用本文： | 马晓栋 马永利 黄国翔. Landau Damping of Collective Modes in a Disc-Shaped Bose-Einstein Condensate[J]. 中国物理快报, 2007, 24(3): 616-619 |
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| 作者姓名： | 马晓栋 马永利 黄国翔 |
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| 作者单位： | [1]Department of Physics, East China Normal University, Shanghai 200062 [2]Department of Physics, Xinjiang Normal University, Urumchi 830054 [3]Department of Physics, Fudan University, Shanghai 200433 |
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| 基金项目： | Supported by National Natural Science Foundation of China under Grant Nos. 90403008, 10434060, and 10574028. |
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| 摘 要： | We investigate the Landau damping of collective modes in an anisotropic Bose Einstein condensate （BEC）, Based on divergence-free analytical solutions for the ground state wavefunction of the condensate and all eigenvalues and eigenfunctions for thermal excited quasiparticles, we make a detailed analytical calculation on coupling matrix elements. We evaluate the Landau damping of a quadrupole collective mode in the BEC with a disc-shaped trap and discuss its dependence on temperature and particle number of the system.
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| 关 键 词： | 冷凝物 爱因斯坦 集体模式 兰道 阻尼 |
| 收稿时间： | 2006-09-19 |
| 修稿时间： | 2006-09-19 |
Landau Damping of Collective Modes in a Disc-Shaped Bose--Einstein Condensate |
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| MA Xiao-Dong,MA Yong-Li,HUANG Guo-Xiang. Landau Damping of Collective Modes in a Disc-Shaped Bose--Einstein Condensate[J]. Chinese Physics Letters, 2007, 24(3): 616-619 |
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| Authors: | MA Xiao-Dong MA Yong-Li HUANG Guo-Xiang |
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| Affiliation: | 1 Department of Physics, East China Normal University, Shanghai 200062 ;2Department of Physics, Xinjiang Normal University, Urumchi 830054 ;3Department of Physics, Fudan University, Shanghai 200433 |
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| Abstract: | We investigate the Landau damping of collective modes in an anisotropic Bose--Einstein condensate (BEC). Based on divergence-free analytical solutions for the ground state wavefunction of the condensate and all eigenvalues and eigenfunctions for thermal excited quasiparticles, we make a detailed analytical calculation on coupling matrix elements. We evaluate the Landau damping of a quadrupole collective mode in the BEC with a disc-shaped trap and discuss its dependence on temperature and particle number of the system. |
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| Keywords: | 03.75.Kk 05.30.Jp 67.40.Db |
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