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

Year: 2000

Authors: Modugno M., Dalfovo F., Fort C., Maddaloni P., Minardi F.

Autors Affiliation: INFM-LENS, Dipartimento di Fisica, Università di Firenze, Largo Enrico Fermi 2, I-50125 Firenze, Italy;
Dipartimento di Matematica e Fisica, Università Cattolica, and Istituto Nazionale per la Fisica della Materia, Gruppo Collegato di Brescia, Via Musei 41, I-25121 Brescia, Italy

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. [Phys. Rev. Lett. 85, 2413 (2000)].

Journal/Review: PHYSICAL REVIEW A

Volume: 62 (6)      Pages from: 063607  to: 063607

KeyWords: Aspect ratio; Magnetic moments; Magnetostatics; Oscillations; Rubidium, Bose-Einstein condensates; Gross-Pitaevskii equations, Molecular dynamics
DOI: 10.1103/PhysRevA.62.063607

Citations: 46
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