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Accessing different regimes by tuning the hopping phase of a weakly connected Bose–Einstein condensate within a two-mode model

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Abstract

We investigate the access of Josephson and Self-Trapping dynamical regimes on Bose–Einstein condensates confined by a rotating multiwell trap. Manipulation of the rotation allows us to tune the hopping phase among neighboring sites within a two-mode model and permits us to demonstrate that it is possible to dynamically connect qualitatively different regimes. For a sudden increase of the rotation frequency, we find that it is possible to reach both Josephson and Self-Trapping regimes starting from a broad range of initial states. Conversely, slow changes in the rotation frequency restrict this possibility to initial states very close to the Josephson–Self-Trapping regime separatrix. These findings are corroborated by numerical simulations of the three-dimensional Gross–Pitaevskii equation.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: All data included in this study are available upon request by contact with the corresponding author.]

Change history

  • 04 February 2022

    In the caption of figure 7 \(\varphi_i\) was mentioned instead of \(\varphi_i\).

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Acknowledgements

This work was supported by CONICET and Universidad de Buenos Aires through Grants PIP 11220150100442CO and UBACyT 20020150100120BA, respectively.

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Authors and Affiliations

  1. Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón 1, Ciudad Universitaria, 1428, Buenos Aires, Argentina

    Mauro Nigro, Pablo Capuzzi & Dora M. Jezek

  2. Instituto de Física de Buenos Aires, CONICET-UBA, Pabellón 1, Ciudad Universitaria, 1428, Buenos Aires, Argentina

    Mauro Nigro, Pablo Capuzzi & Dora M. Jezek

Authors
  1. Mauro Nigro
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  2. Pablo Capuzzi
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  3. Dora M. Jezek
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All authors contributed equally to the paper.

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Correspondence to Pablo Capuzzi.

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Nigro, M., Capuzzi, P. & Jezek, D.M. Accessing different regimes by tuning the hopping phase of a weakly connected Bose–Einstein condensate within a two-mode model. Eur. Phys. J. D 76, 12 (2022). https://doi.org/10.1140/epjd/s10053-022-00340-7

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