Dynamics of Bose-Einstein condensates under anharmonic trap

被引：1

作者：

Al-Jibbouri, H. ^{[1
]}

机构：

[1] Univ Al Qadisiyah, Coll Sci, Al Diwaniya 58002, Al Qadisiyah, Iraq

来源：

CONDENSED MATTER PHYSICS | 2022年 / 25卷 / 02期

关键词：

Bose-Einstein condensates; Gross-Pitaevskii equation; anharmonic trap; LOW-ENERGY EXCITATIONS; COLLECTIVE EXCITATIONS; 3-BODY INTERACTIONS; NONLINEAR DYNAMICS; GROUND-STATE; GAS; STABILITY; COLLAPSE;

D O I：

10.5488/CMP.25.23301

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The dynamics of weakly interacting three-dimensional Bose-Einstein condensates (BECs), trapped in external axially symmetric plus anharmonic distortion potential are studied. Within a variational approach and time-dependent Gross-Pitaevskii equation, the coupled condensate width equations are derived. By modulating anharmonic distortion of the trapping potential, nonlinear features are studied numerically and illustrated analytically, such as mode coupling of oscillation modes, and resonances. Furthermore, the stability of attractive interaction BEC in both repulsive and attractive anharmonic distortion is examined. We demonstrate that a small repulsive and attractive anharmonic distortion is effective in reducing (extending) the condensate stability region since it decreases (increases) the critical number of atoms in the trapping potential.

引用

页数：8

共 52 条

[11] BOSE-EINSTEIN CONDENSATION IN A GAS OF SODIUM ATOMS [J].

DAVIS, KB ;

MEWES, MO ;

ANDREWS, MR ;

VANDRUTEN, NJ ;

DURFEE, DS ;

KURN, DM ;

KETTERLE, W .

PHYSICAL REVIEW LETTERS, 1995, 75 (22) :3969-3973

[12] Instability of a Bose-Einstein condensate with an attractive interaction [J].

Eleftheriou, A ;

Huang, K .

PHYSICAL REVIEW A, 2000, 61 (04) :7-436017

[13] Bose-Einstein condensation in a dilute gas: Measurement of energy and ground-state occupation [J].

Ensher, JR ;

Jin, DS ;

Matthews, MR ;

Wieman, CE ;

Cornell, EA .

PHYSICAL REVIEW LETTERS, 1996, 77 (25) :4984-4987

[14] Recombination of three atoms in the ultracold limit [J].

Esry, BD ;

Greene, CH ;

Burke, JP .

PHYSICAL REVIEW LETTERS, 1999, 83 (09) :1751-1754

[15] Effect of anharmonicities in the critical number of trapped condensed atoms with an attractive two-body interaction [J].

Filho, VS ;

Gammal, A ;

Tomio, L .

PHYSICAL REVIEW A, 2002, 66 (04) :5

[16] Bose-Einstein condensation of atomic hydrogen [J].

Fried, DG ;

Killian, TC ;

Willmann, L ;

Landhuis, D ;

Moss, SC ;

Kleppner, D ;

Greytak, TJ .

PHYSICAL REVIEW LETTERS, 1998, 81 (18) :3811-3814

[17] Critical numbers of attractive Bose-Einstein condensed atoms in asymmetric traps [J].

Gammal, A ;

Tomio, L ;

Frederico, T .

PHYSICAL REVIEW A, 2002, 66 (04) :5

[18] Improved numerical approach for the time-independent Gross-Pitaevskii nonlinear Schrodinger equation [J].

Gammal, A ;

Frederico, T ;

Tomio, L .

PHYSICAL REVIEW E, 1999, 60 (02) :2421-2424

[19] Extended parametric resonances in nonlinear Schrodinger systems [J].

García-Ripoll, JJ ;

Pérez-García, VM ;

Torres, P .

PHYSICAL REVIEW LETTERS, 1999, 83 (09) :1715-1718

[20] Direct observation of growth and collapse of a Bose-Einstein condensate with attractive interactions [J].

Gerton, JM ;

Strekalov, D ;

Prodan, I ;

Hulet, RG .

NATURE, 2000, 408 (6813) :692-695

← 1 2 3 4 5 6 →