The stability condition and collective excitation of a trapped Bose-Einstein condensate with higher-order interactions

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	The stability condition and collective excitation of a trapped Bose-Einstein condensate with higher-order interactions
	W. Qi; Z. X. Liang; Z. D. Zhang
	2013
发表期刊	Journal of Physics B-Atomic Molecular and Optical Physics
ISSN	0953-4075
卷号	46 期号:17
摘要	We take into account the higher-order corrections in two-body scattering interactions within a mean-field description, and investigate the stability conditions and collective excitations of a harmonically trapped Bose-Einstein condensate (BEC). Our results show that the presence of higher-order corrections causes drastic changes to the stability condition of a BEC. In particular, we predict that with the help of the higher-order interaction, a BEC can now collapse even for positive scattering lengths; whereas, a usually unstable BEC with a negative scattering length can be stabilized by positive higher-order effects. The low-lying collective excitations are significantly modified as well, compared to those without the higher-order corrections. The conditions for a possible experimental scenario are also proposed.
部门归属	[qi, wei ; liang, zhaoxin ; zhang, zhidong] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; liang, zx (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china. ; zhxliang@imr.ac.cn
关键词	Feshbach Resonances Atoms Dynamics Gases
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71429
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Qi,Z. X. Liang,Z. D. Zhang. The stability condition and collective excitation of a trapped Bose-Einstein condensate with higher-order interactions[J]. Journal of Physics B-Atomic Molecular and Optical Physics,2013,46(17).
APA	W. Qi,Z. X. Liang,&Z. D. Zhang.(2013).The stability condition and collective excitation of a trapped Bose-Einstein condensate with higher-order interactions.Journal of Physics B-Atomic Molecular and Optical Physics,46(17).
MLA	W. Qi,et al."The stability condition and collective excitation of a trapped Bose-Einstein condensate with higher-order interactions".Journal of Physics B-Atomic Molecular and Optical Physics 46.17(2013).