| 非简谐势中两组分简并费米气体的集体激发 |
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| 引用本文： | 薛具奎,刘国荣,李好财,张科智. 非简谐势中两组分简并费米气体的集体激发[J]. 西北师范大学学报(自然科学版), 2010, 46(1): 26-32 |
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| 作者姓名： | 薛具奎 刘国荣 李好财 张科智 |
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| 作者单位： | 西北师范大学物理与电子工程学院,甘肃兰州730070 |
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| 基金项目： | 国家自然科学基金，甘肃省自然科学基金，西北师范大学科技创新工程项目 |
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| 摘 要： | 研究了在一个扭曲的谐振势中两组分简并费米气体的集体激发.运用变分法导出了1组描述两组分简并费米气体质心运动与宽度变化的耦合方程,获得了2个低能激发模.在不同的有效s波相互作用和有效p波相互作用下,分别讨论了由于势的非简谐改变引起的集体激发的频移和集体激发的塌缩与恢复.
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| 关 键 词： | 两组分简并费米气体 非简谐势阱 集体激发 频移 塌缩与恢复 |
Collective excitations of two-component degenerate Fermi gases in an anharmonic trap |
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| XUE Ju-kui,LIU Guo-rong,LI Hao-cai,ZHANG Ke-zhi. Collective excitations of two-component degenerate Fermi gases in an anharmonic trap[J]. Journal of Northwest Normal University Natural Science (Bimonthly), 2010, 46(1): 26-32 |
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| Authors: | XUE Ju-kui LIU Guo-rong LI Hao-cai ZHANG Ke-zhi |
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| Affiliation: | XUE Ju-kui,LIU Guo-rong,LI Hao-cai,ZHANG Ke-zhi(College of Physics , Electronic Engineering,Northwest Normal University,Lanzhou 730070,Gansu,China) |
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| Abstract: | The collective excitations of two-component degenerate Fermi gases in a harminic trap with a quartic distortion are investigated.Using variational approaches,the coupled equations of motions for the center-of-mass coordinate and width of two-component degenerate Fermi gases are derived.Then two low-energy excitation modes are obtained analytically.The freqency shift,collapse and revival of the collective excitations of two-component degenerate Fermi gases induced by the anharmonic distortion under different... |
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| Keywords: | two-component degenerate Fermi gases anharmonic trap collective excitation freqency shift collapse and revival |
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