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

共 52 条

[21] Splitting a trap containing a Bose-Einstein condensate: Atom number fluctuations [J].

Javanainen, J ;

Ivanov, MY .

PHYSICAL REVIEW A, 1999, 60 (03) :2351-2359

[22] Long phase coherence time and number squeezing of two Bose-Einstein condensates on an atom chip [J].

Jo, G. -B. ;

Shin, Y. ;

Will, S. ;

Pasquini, T. A. ;

Saba, M. ;

Ketterle, W. ;

Pritchard, D. E. ;

Vengalattore, M. ;

Prentiss, M. .

PHYSICAL REVIEW LETTERS, 2007, 98 (03)

[23] Revealing Single-Trap Condensate Fragmentation by Measuring Density-Density Correlations after Time of Flight [J].

Kang, Myung-Kyun ;

Fischer, Uwe R. .

PHYSICAL REVIEW LETTERS, 2014, 113 (14)

[24] Goldstone-mode instability leading to fragmentation in a spinor Bose-Einstein condensate [J].

Kawaguchi, Yuki .

PHYSICAL REVIEW A, 2014, 89 (03)

[25] EIGENVALUES OF THE LAPLACIAN IN 2 DIMENSIONS [J].

KUTTLER, JR ;

SIGILLITO, VG .

SIAM REVIEW, 1984, 26 (02) :163-193

[26] Comment on "Phase and phase diffusion of a split Bose-Einstein condensate" [J].

Leggett, AJ ;

Sols, F .

PHYSICAL REVIEW LETTERS, 1998, 81 (06) :1344-1344

[27]

Lode A. U. J., 2014, RECURSIVE MULTICONFI

[28] Numerically exact quantum dynamics of bosons with time-dependent interactions of harmonic type [J].

Lode, Axel U. J. ;

Sakmann, Kaspar ;

Alon, Ofir E. ;

Cederbaum, Lorenz S. ;

Streltsov, Alexej I. .

PHYSICAL REVIEW A, 2012, 86 (06)

[29] QUANTUM THEORY OF MANY-PARTICLE SYSTEMS .1. PHYSICAL INTERPRETATIONS BY MEANS OF DENSITY MATRICES, NATURAL SPIN-ORBITALS, AND CONVERGENCE PROBLEMS IN THE METHOD OF CONFIGURATIONAL INTERACTION [J].

LOWDIN, PO .

PHYSICAL REVIEW, 1955, 97 (06) :1474-1489

[30] Splitting and merging an elongated Bose-Einstein condensate at finite temperature [J].

Mebrahtu, A ;

Sanpera, A ;

Lewenstein, M .

PHYSICAL REVIEW A, 2006, 73 (03) :1-7

← 1 2 3 4 5 6 →