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Q: Quantenoptik
Q 6: Atom Optics II
Q 6.3: Talk
Monday, April 2, 2001, 18:00–18:15, H 104
Bright atomic solitons for repulsive interaction — •B. Eiermann1, B. Brezger2, A. Sizmann3, K. Forberich1, T. Anker1, J. Bellanca1, J. Mlynek4, and M.K. Oberthaler1 — 1Fachbereich Physik, Universität Konstanz, 78457 Konstanz — 2Institut für Experimentalphysik, Universität Wien, 1090 Wien — 3Innovance Networks, Ottawa, Canada — 4Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin
The experimental realization of Bose-Einstein condensates in dilute atomic gases has facilitated the extension of atom optics from the linear to the nonlinear regime. It is well known that Bose-condensed atoms can be treated to a good approximation by a mean-field theory, leading to the Gross-Pitaevskii equation (GPE).
In the case of repulsive atom-atom interaction and evolution in free space dark solitons are solutions of the GPE [1][2]. However, bright atomic solitons are interesting for applications because the nonlinearity can be maintained for a longer time. The general idea for preparing bright solitons with repulsive interaction is to use atoms in a one-dimensional periodic potential utilizing the negative effective mass [3].
We present an analytical and numerical investigation of one-dimensional bright solitons for atomic many-particle matter waves with repulsive interaction. We present the feasibility of an experimental realization and discuss the necessary parameter space.
[1] Burger et al., PRL 83, 5198 (1999)
[2] Denschlag et al., Science 287, 97 (2000)
[3] Pötting et al., cond-mat/0009289, 20.Sep 2000