Generating vortex rings in Bose-Einstein condensates in the line-source approximation

被引：12

作者：

Guilleumas, M ^{[1
]}

Jezek, DM

Mayol, R

Pi, M

Barranco, M

机构：

[1] Univ Barcelona, Fac Fis, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain

[2] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, Argentina

[3] Consejo Nacl Invest Cient & Tecn, RA-1428 Buenos Aires, DF, Argentina

来源：

PHYSICAL REVIEW A | 2002年 / 65卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.65.053609

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a numerical method for generating vortex rings in Bose-Einstein condensates confined in axially symmetric traps. The vortex ring is generated using the line-source approximation for the vorticity, i.e., the curl of the superfluid velocity field is different from zero only on a circumference of a given radius located on a plane perpendicular to the symmetry axis and coaxial with it. The particle density is obtained by solving a modified Gross-Pitaevskii equation that incorporates the effect of the velocity field. We discuss the appearance of density profiles, the vortex core structure, and the vortex nucleation energy, i.e., the energy difference between vortical and ground-state configurations. This is used to present a qualitative description of the vortex dynamics.

引用

页码：536091 / 536097

页数：7

共 28 条

[21] Hydrodynamic approach to vortex lifetimes in trapped Bose condensates [J].

Lundh, E ;

Ao, P .

PHYSICAL REVIEW A, 2000, 61 (06) :7

[22] Vortex formation in a stirred Bose-Einstein condensate [J].

Madison, KW ;

Chevy, F ;

Wohlleben, W ;

Dalibard, J .

PHYSICAL REVIEW LETTERS, 2000, 84 (05) :806-809

[23] Vortices in a Bose-Einstein condensate [J].

Matthews, MR ;

Anderson, BP ;

Haljan, PC ;

Hall, DS ;

Wieman, CE ;

Cornell, EA .

PHYSICAL REVIEW LETTERS, 1999, 83 (13) :2498-2501

[24] Quantized vortices in mixed 3He-4He drops -: art. no. 145301 [J].

Mayol, R ;

Pi, M ;

Barranco, M ;

Dalfovo, F .

PHYSICAL REVIEW LETTERS, 2001, 87 (14) :145301/1-145301/4

[25] Vertically coupled quantum dots in the local spin-density functional theory [J].

Pi, M ;

Emperador, A ;

Barranco, M ;

Garcias, F .

PHYSICAL REVIEW B, 2001, 63 (11)

[26] Creating vortex rings and three-dimensional skyrmions in Bose-Einstein condensates [J].

Ruostekoski, J ;

Anglin, JR .

PHYSICAL REVIEW LETTERS, 2001, 86 (18) :3934-3937

[27] CREATION OF QUANTIZED VORTEX RINGS BY CHARGE-CARRIERS IN SUPERFLUID-HELIUM [J].

SCHWARZ, KW ;

JANG, PS .

PHYSICAL REVIEW A, 1973, 8 (06) :3199-3210

[28] Vortex structures in dilute quantum fluids [J].

Winiecki, T ;

McCann, JF ;

Adams, CS .

EUROPHYSICS LETTERS, 1999, 48 (05) :475-481

← 1 2 3 →