Bogoliubov excitation spectrum of an elongated condensate throughout a transition from quasi-one-dimensional to three-dimensional

doi:10.1088/0953-4075/47/3/035302

	Bogoliubov excitation spectrum of an elongated condensate throughout a transition from quasi-one-dimensional to three-dimensional
	Yang, Tao 1,2; Henning, Andrew J.1; Benedict, Keith A.1
刊名	JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
	2014-02-14
卷号	47
关键词	Bogoliubov Excitation Spectrum Highly Anisotropic Trap Elongated Condensate Effective 1d-gp Equation Transition Crossover Junction
ISSN号	0953-4075
DOI	10.1088/0953-4075/47/3/035302
文献子类	Article
英文摘要	The quasiparticle excitation spectra of a Bose gas trapped in a highly anisotropic trap is studied with respect to varying total number of particles by numerically solving the effective one-dimensional (1D) Gross-Pitaevskii (GP) equation proposed recently by Mateo et al. We obtain the static properties and Bogoliubov spectra of the system in the high energy domain. This method is computationally efficient and highly accurate for a condensate system undergoing a 1D to three-dimensional (3D) cigar-shaped transition, as is shown through a comparison of our results with both those calculated by the 3D-GP equation and analytical results obtained in limiting cases. We identify the applicable parameter space for the effective 1D-GP equation and find that this equation fails to describe a system with a large number of atoms. We also identify that the description of the transition from 1D Bose-Einstein condensate (BEC) to 3D cigar-shaped BEC using this equation is not smooth, which highlights the fact that for a finite value of a(perpendicular to)/a(s) the junction between the 1D and 3D crossover is not perfect.
WOS关键词	BOSE-EINSTEIN CONDENSATE ; LOW-ENERGY EXCITATIONS ; COLLECTIVE EXCITATIONS ; NONLINEAR DYNAMICS ; GASES ; SYSTEMS ; TRAPS
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000330215600013
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/49477]
专题	中国科学院近代物理研究所
通讯作者	Yang, Tao
作者单位	1.Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England 2.NW Univ Xian, Inst Modern Phys, Xian 710069, Peoples R China
推荐引用方式 GB/T 7714	Yang, Tao,Henning, Andrew J.,Benedict, Keith A.. Bogoliubov excitation spectrum of an elongated condensate throughout a transition from quasi-one-dimensional to three-dimensional[J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,2014,47.
APA	Yang, Tao,Henning, Andrew J.,&Benedict, Keith A..(2014).Bogoliubov excitation spectrum of an elongated condensate throughout a transition from quasi-one-dimensional to three-dimensional.JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,47.
MLA	Yang, Tao,et al."Bogoliubov excitation spectrum of an elongated condensate throughout a transition from quasi-one-dimensional to three-dimensional".JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS 47(2014).