Dynamics of spin-2 Bose condensate driven by external magnetic fields

Details Dynamics of spin-2 Bose condensate driven by external magnetic fields Dynamics of spin-2 Bose condensate driven by external magnetic fields

2002-10-11

arxiv.org/abs/cond-mat/0210252v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

16 pages, 7 figures. accepted by Phys. Rev. A

Scientific paper

10.1103/PhysRevA.66.043606

Dynamic response of the F=2 spinor Bose-Einstein condensate (BEC) under the influence of external magnetic fields is studied. A general formula is given for the oscillation period to describe population transfer from the initial polar state to other spin states. We show that when the frequency and the reduced amplitude of the longitudinal magnetic field are related in a specific manner, the population of the initial spin-0 state will be dynamically localized during time evolution. The effects of external noise and nonlinear spin exchange interaction on the dynamics of the spinor BEC are studied. We show that while the external noise may eventually destroy the Rabi oscillations and dynamic spin localization, these coherent phenomena are robust against the nonlinear atomic interaction.

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