THE LONGITUDINAL EXCITATION SPECTRUM OF AN ELONGATED BOSE-EINSTEIN CONDENSATE

被引:0
作者
Raportaru, M. C. [1 ]
Zus, R. [2 ]
机构
[1] Horia Hulubei Natl Inst Phys & Nucl Engn, Dept Computat Phys & Informat Technol, Reactorului 30, Magurele, Ilfov, Romania
[2] Univ Bucharest, Fac Phys, Atomistilor 405, Magurele, Ilfov, Romania
来源
ROMANIAN JOURNAL OF PHYSICS | 2018年 / 63卷 / 1-2期
关键词
Bose-Einstein condensates; longitudinal excitations; scientific computing; FARADAY WAVES;
D O I
暂无
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In this manuscript we show an efficient numerical approach for the longitudinal excitation spectrum of a quasi-one-dimensional collisionally-inhomogeneous Bose-Einstein condensate. We obtain by variational means the nonlinear ordinary differential equations of a generic longitudinal excitation and determine numerically the onset of instability, to identify which excitation is most likely to be observed experimentally. To quantify the efficiency of our approach, we study a cigar-shaped condensate with weak collisionally-inhomogeneous two-body interactions and show that the position of the resonance observed in the longitudinal excitation spectrum is higher than that observed for a condensate with homogeneous two-body interactions.
引用
收藏
页数:7
相关论文
共 21 条
[1]  
Bagnato VS, 2015, ROM REP PHYS, V67, P5
[2]  
Bak P., 1999, NATURE WORKS SCI SEL
[3]  
Balasubramanian S, 2013, ROM REP PHYS, V65, P820
[4]   Faraday waves in collisionally inhomogeneous Bose-Einstein condensates [J].
Balaz, Antun ;
Paun, Remus ;
Nicolin, Alexandru I. ;
Balasubramanian, Sudharsan ;
Ramaswamy, Radha .
PHYSICAL REVIEW A, 2014, 89 (02)
[5]   Fast convergence of path integrals for many-body systems [J].
Bogojevic, A. ;
Vidanovic, I. ;
Balaz, A. ;
Belic, A. .
PHYSICS LETTERS A, 2008, 372 (19) :3341-3349
[6]  
Butcher J. C., 2016, Numerical methods for ordinary differential equations
[7]   PATTERN-FORMATION OUTSIDE OF EQUILIBRIUM [J].
CROSS, MC ;
HOHENBERG, PC .
REVIEWS OF MODERN PHYSICS, 1993, 65 (03) :851-1112
[8]   On the observation of nonclassical excitations in Bose-Einstein condensates [J].
Finke, Andreas ;
Jain, Piyush ;
Weinfurtner, Silke .
NEW JOURNAL OF PHYSICS, 2016, 18
[9]  
KEVREKIDIS P, 2010, EMERGENT NONLINEAR P
[10]   Pattern forming dynamical instabilities of Bose-Einstein condensates [J].
Kevrekidis, PG ;
Frantzeskakis, DJ .
MODERN PHYSICS LETTERS B, 2004, 18 (5-6) :173-202