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Dynamics of two colliding Bose-Einstein condensates in an elongated magneto-static trap

M. Modugno·F. Dalfovo·C. Fort·P. Maddaloni·F. Minardi
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Abstract

We study the dynamics of two interacting Bose-Einstein condensates, by numerically solving two coupled Gross-Pitaevskii equations at zero temperature. We consider the case of a sudden transfer of atoms between two trapped states with different magnetic moments: the two condensates are initially created with the same density profile, but are trapped into different magnetic potentials, whose minima are vertically displaced by a distance much larger than the initial size of both condensates. Then the two condensates begin to perform collective oscillations, undergoing a complex evolution, characterized by collisions between the two condensates. We investigate the effects of their mutual interaction on the center-of-mass oscillations and on the time evolution of the aspect ratios. Our theoretical analysis provides a useful insight into the recent experimental observations by Maddaloni et al., cond-mat/0003402.

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M. Modugno, F. Dalfovo, C. Fort, P. Maddaloni, F. Minardi. 2000-07-06. Dynamics of two colliding Bose-Einstein condensates in an elongated magneto-static trap. https://doi.org/10.1103/physreva.62.063607

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