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Autor: search.filters.author.Ramos, Edmir Ravazzi FrancoAssunto: search.filters.subject.Condensação de Bose-Einstein

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    Oscillatory interaction in a Bose-Einstein condensate: collective and topological excitations
    (2012-05-29) Ramos, Edmir Ravazzi Franco
    In this work, we theoretically analyze the behavior of a Bose-Einstein condensate when it is submitted to oscillatory interactions. For that, a homogeneous magnetic field is applied, tuned near a Feshbach resonance, and then it is set to oscillate in time. This variation of the magnetic field causes a scattering length oscillation, which oscillates to interatomic interaction. Thus, we study collective and topological excitations due this oscillation in the interaction. In addition, we have seen a coupling between collective modes as well a dynamical phase transition associated to topological excitation