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    Bright Bose-Einstein Gap Solitons of Atoms with Repulsive Interaction

    B. Eiermann1, Th. Anker1, M. Albiez1, M. Taglieber2, P. Treutlein2, K.-P. Marzlin3, and M. K. Oberthaler1

    • 1Kirchhoff Institut für Physik, Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
    • 2Max-Planck-Institut für Quantenoptik und Sektion Physik der Ludwig-Maximilians-Universität, Schellingstrasse 4, 80799 München, Germany
    • 3Department of Physics and Astronomy, Quantum Information Science Group, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4

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    Phys. Rev. Lett. 92, 230401 – Published 8 June, 2004

    DOI: https://doi.org/10.1103/PhysRevLett.92.230401

    Abstract

    We report on the first experimental observation of bright matter wave solitons for Rb87 atoms with repulsive atom-atom interaction. This counterintuitive situation arises inside a weak periodic potential, where anomalous dispersion can be realized at the Brillouin zone boundary. If the coherent atomic wave packet is prepared at the corresponding band edge, a bright soliton is formed inside the gap. The strength of our system is the precise control of preparation and real time manipulation, allowing the systematic investigation of gap solitons.

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    Phys. Rev. Lett. 92, 230401– Published 8 June, 2004
    • Received 16 December 2003

    © 2004 American Physical Society

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