Regular Article – Cold Matter and Quantum Gases
Accessing different regimes by tuning the hopping phase of a weakly connected Bose–Einstein condensate within a two-mode model
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón 1, Ciudad Universitaria, 1428, Buenos Aires, Argentina
2 Instituto de Física de Buenos Aires, CONICET-UBA, Pabellón 1, Ciudad Universitaria, 1428, Buenos Aires, Argentina
Accepted: 5 January 2022
Published online: 18 January 2022
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.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022