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SYIM: Intrinsic Modes
SYIM 2: Intrinsic Modes II
SYIM 2.3: Invited Talk
Thursday, March 30, 2006, 18:00–18:30, HSZ 04
Localized matter waves — •Markus Oberthaler — Kirchhoff Institut für Physik, Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
The realization of weakly interacting degenerate Bose-gases has opened
up the way to experimentally investigate the regime, where interaction
between matter waves can lead to localization. In this talk we will
discuss the special case of localization in presence of repulsive
atom-atom interaction.
In the first part of the talk we will concentrate on the propagation of
interacting matter waves in periodic potentials. We will discuss in
detail the formation of localized i.e. atomic gap solitons, in a weak
periodic potential [1]. In the regime of deep periodic potentials i.e.
an array of weakly coupled condensates, we have observed for the first
time macroscopic quantum self-trapping [2]. In contrast to the gap
soliton the localization is due to the modification of the local
dynamics between neighbouring sites in the presence of interaction.
In the second part of the talk we will report on the localization due
interaction in a double-well potential [3]. We confirm experimentally
that the exhibited dynamics is a nonlinear generalization of the
familiar Josephson effect which is characterized by oscillating but also
self-trapped modes.
[1] B. Eiermann et al., Phys. Rev. Lett. 92, 230401(2004)
[2] Th. Anker et al., Phys.Rev.Lett. 94, 020403 (2005)
[3] M. Albiez et al., Phys.Rev.Lett. 95,010402 (2005)