Vortices in a rotating two-component Bose–Einstein condensate with tunable interactions and harmonic potential

Journal Article · Tue Jul 15 00:00:00 EDT 2014 · Annals of Physics (New York)

DOI:https://doi.org/10.1016/J.AOP.2014.04.015· OSTI ID:22314839

Zhang, Xiao-Fei ^[1]; Du, Zhi-Jing ^[1]; Tan, Ren-Bing ^[2]; Dong, Rui-Fang; Chang, Hong; Zhang, Shou-Gang ^[1]

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1. Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600 (China)
2. Department of Physics, School of Mathematics and Physics, Chongqing University of Science and Technology, Chongqing 401331 (China)

We consider a pair of coupled nonlinear Schrödinger equations modeling a rotating two-component Bose–Einstein condensate with tunable interactions and harmonic potential, with emphasis on the structure of vortex states by varying the strength of inter-component interaction, rotational frequency, and the aspect ratio of the harmonic potential. Our results show that the inter-component interaction greatly enhances the effect of rotation. For the case of isotropic harmonic potential and small inter-component interaction, the initial vortex structure remains unchanged. As the ratio of inter- to intra-component interactions increases, each component undergoes a transition from a vortex lattice (vortex line) in an isotropic (anisotropic) harmonic potential to an alternatively arranged stripe pattern, and eventually to the interwoven “serpentine” vortex sheets. Moreover, in the case of anisotropic harmonic potential the system can develop to a rotating droplet structure. -- Highlights: •Different vortex structures are obtained within the full parameter space. •Effects of system parameters on the ground state structure are discussed. •Phase transition between different vortex structures is also examined. •Present one possible way to obtain the rotating droplet structure. •Provide many possibilities to manipulate vortex in two-component BEC.

• OSTI ID: 22314839
• Journal Information: Annals of Physics (New York), Vol. 346, Issue Complete; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-4916
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
ASPECT RATIO
BOSE-EINSTEIN CONDENSATION
DROPLETS
GROUND STATES
HARMONIC POTENTIAL
NONLINEAR PROBLEMS
PHASE TRANSFORMATIONS
ROTATION
SCHROEDINGER EQUATION
VORTICES