Self-trapping and tunneling of Bose-Einstein condensates in a cavity-mediated triple-well system

Regular Article

DOI: 10.1140/epjd/e2017-70647-3

Cite this article as:
Wang, B., Zhang, H., Chen, Y. et al. Eur. Phys. J. D (2017) 71: 56. doi:10.1140/epjd/e2017-70647-3
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Abstract

We have investigated tunneling characteristics of Bose-Einstein condensates (BECs) in a triple-well potential coupled to a high finesse optical cavity within a mean field approach. Due to the intrinsic atom-cavity field nonlinearity, several interesting phenomena arise which are the focuses of this work. In the dynamical process, an extensive numerical simulation of localization of the BECs for atoms initially trapped in one-, two-, and three-wells are performed for the symmetric and asymmetric cases in detail. It is shown that the the transition from the oscillation to the localization can be modified by the cavity-mediated potential, which will enlarge the regions of oscillation. With the increasing of the atomic interaction, the oscillation is blocked and the localization emerges. The condensates atoms can be trapped either in one-, two-, or in three wells eventually where they are initially uploaded for certain parameters. In particular, we find that the transition from the oscillation to the localization is accompanied with some irregular regime where tunneling dynamics is dominated by chaos for this cavity-mediated system.

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Keywords

Cold Matter and Quantum Gas 

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.College of Physics and Optoelectronic Engineering, Taiyuan University of TechnologyTaiyuanP.R. China
  2. 2.College of Mechanics, Taiyuan University of TechnologyTaiyuanP.R. China
  3. 3.School of Physics and Electromechanical Engineering, Hexi UniversityZhangyeP.R. China
  4. 4.Institute of Theoretical Physics, Lanzhou UniversityLanzhouP.R. China

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