Matter-Wave Solitons in an F=1 Spinor Bose-Einstein Condensate

Details Matter-Wave Solitons in an F=1 Spinor Bose-Einstein Condensate Matter-Wave Solitons in an F=1 Spinor Bose-Einstein Condensate

2004-10-15

arxiv.org/abs/cond-mat/0410384v1

J. Phys. Soc. Jpn. Vol.73, 2996 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 9 figures, to appear in J. Phys. Soc. Jpn. Vol.73 No.11 (2004)

Scientific paper

10.1143/JPSJ.73.2996

Following our previous work [J. Ieda, T. Miyakawa, M. Wadati, cond-mat/0404569] on a novel integrable model describing soliton dynamics of an F=1 spinor Bose--Einstein condensate, we discuss in detail the properties of the multi-component system with spin-exchange interactions. The exact multiple bright soliton solutions are obtained for the system where the mean-field interaction is attractive (c_0 < 0) and the spin-exchange interaction is ferromagnetic (c_2 < 0). A complete classification of the one-soliton solution with respect to the spin states and an explicit formula of the two-soliton solution are presented. For solitons in polar state, there exists a variety of different shaped solutions including twin peaks. We show that a "singlet pair" density can be used to distinguish those energetically degenerate solitons. We also analyze collisional effects between solitons in the same or different spin state(s) by computing the asymptotic forms of their initial and final states. The result reveals that it is possible to manipulate the spin dynamics by controlling the parameters of colliding solitons.

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