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Quantum tunneling and entanglement of dipolar spin-1 bosons in double well potentials

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Abstract

We study spinor Bose-Einstein condensates with dipolar interaction in double well potentials. We consider the two-site Bose Hubbard model and find single atom tunneling occurs for the small tunneling strength. We also investigate the entanglement between the two wells and show that the entanglement is due to both number and spin degrees of freedom. The number entanglement is insensitive to the dipolar interaction, while the spin entanglement is suppressed by dipolar interaction. In addition, we show that the single atom tunneling behavior can be manipulated by adiabatically varying the energy offset between the two wells.

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Authors and Affiliations

  1. School of Science, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, 310023, P.R. China

    Yixiao Huang

  2. Department of Physics and Center of Theoretical and Computational Physics, The University of Hong Kong, Hong Kong, P.R. China

    Yixiao Huang

  3. Department of Physics, Changchun University of Science and Technology, Changchun, 130022, P.R. China

    Xiaoqian Wang

  4. Department of Physics, Hangzhou Normal University, Hangzhou, 310036, P.R. China

    Zhe Sun

  5. Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, Hangzhou, 310027, P.R. China

    Xiaoguang Wang

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  1. Yixiao Huang
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  2. Xiaoqian Wang
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  3. Zhe Sun
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  4. Xiaoguang Wang
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Correspondence to Yixiao Huang.

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Huang, Y., Wang, X., Sun, Z. et al. Quantum tunneling and entanglement of dipolar spin-1 bosons in double well potentials. Eur. Phys. J. D 69, 181 (2015). https://doi.org/10.1140/epjd/e2015-50814-4

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