Low-energy elementary excitations of a trapped Bose-condensed gas

被引：102

作者：

Ohberg, P

Surkov, EL

Tittonen, I

Stenholm, S

Wilkens, M

Shlyapnikov, GV

机构：

[1] RUSSIAN RES CTR, IV KURCHATOV ATOM ENERGY INST, MOSCOW 123182, RUSSIA

[2] FOM, INST ATOM & MOL PHYS, NL-1098 SJ AMSTERDAM, NETHERLANDS

[3] UNIV KONSTANZ, FAK PHYS, D-78434 CONSTANCE, GERMANY

来源：

PHYSICAL REVIEW A | 1997年 / 56卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.56.R3346

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We develop a method of finding analytical solutions of the Bogolyubov-de Gennes equations for the excitations of a Bose condensate in the Thomas-Fermi regime in harmonic traps of any asymmetry and introduce a classification of eigenstates. In the case of cylindrical symmetry we emphasize the presence of an accidental degeneracy in the excitation spectrum at certain values of the projection of orbital angular momentum on the symmetry axis and discuss possible consequences of the degeneracy in the context of new signatures of Bose-Einstein condensation. [S1050-2947(97)51410-7].

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收藏

页码：R3346 / R3349

页数：4

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