Breaking the resilience of a two-dimensional Bose-Einstein condensate to fragmentation

被引：27

作者：

Klaiman, Shachar ^{[1
]}

Lode, Axel U. J. ^{[2
]}

Streltsov, Alexej I. ^{[1
]}

Cederbaum, Lorenz S. ^{[1
]}

Alon, Ofir E. ^{[3
]}

机构：

[1] Heidelberg Univ, Inst Phys Chem, D-69120 Heidelberg, Germany

[2] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

[3] Univ Haifa, Dept Phys, IL-36006 Tivon, Israel

来源：

PHYSICAL REVIEW A | 2014年 / 90卷 / 04期

关键词：

DOUBLE-WELL; PARTICLE; GASES;

D O I：

10.1103/PhysRevA.90.043620

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A two-dimensional Bose-Einstein condensate (BEC) split by a radial potential barrier is investigated. We determine on an accurate many-body level the system's ground-state phase diagram as well as a time-dependent phase diagram of the splitting process. Whereas the ground state is condensed for a wide range of parameters, the time-dependent splitting process leads to substantial fragmentation. We demonstrate the dynamical fragmentation of a BEC despite its ground state being condensed. The results are analyzed using a mean-field model and suggest that a large manifold of low-lying fragmented excited states can significantly impact the dynamics of trapped two-dimensional BECs.

引用

页数：6

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