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Collective spin tunneling in spinor Bose-Einstein condensates

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Abstract

We investigate a novel aspect of rotational tunneling of the macroscopic spin for multicomponent spinor Bose-Einstein condensate (BEC). The Lagrangian is deduced from the multi-component BEC system formalism, and is written in terms of spin coherent states. From the effective Hamiltonian for the collective spin, the tunneling rate is obtained through a functional integral of the spin variable. It is pointed out that the cooperative effect between the Zeeman energy and the anisotropic nature of the spin-dependent inter-atomic interaction plays a key role for occurrence of collective spin tunneling.

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Authors and Affiliations

  1. Department of Physics, Ritsumeikan University-BKC, Noji-Hill, Kusatsu City, 525-8577, Japan

    H. Kuratsuji

  2. Laboratoire de Physique des Solides, Bâtiment 510, CNRS UMR8502 / Université Paris-Sud, Centre d’Orsay, 91405, Orsay, France

    R. Botet

Authors
  1. H. Kuratsuji
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  2. R. Botet
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Correspondence to R. Botet.

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Kuratsuji, H., Botet, R. Collective spin tunneling in spinor Bose-Einstein condensates. Eur. Phys. J. D 49, 111–116 (2008). https://doi.org/10.1140/epjd/e2008-00129-8

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  • DOI: https://doi.org/10.1140/epjd/e2008-00129-8

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