2008/04/30 by M. Rosenkranz, Matthias Rosenkranz, D. Jaksch +5
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Nonlinear Photonic Systems #Strong Light-Matter Interactions #cond-mat.other #quant-ph
paper · pdf · doi:10.1103/physreva.77.063607
published as Phys. Rev. A 77, 063607 (2008) · 7 pages, 5 figures, RevTeX4. Published version. Changed title, minor clarifications, added two references, also added arXiv ids for most references
openalex publication_date 2008/06/11 · arxiv created 2008/06/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We observe a sudden breakdown of the transport of a strongly repulsive Bose-Einstein condensate through a shallow optical lattice of finite width. We are able to attribute this behavior to the development of a self-trapped state by using accurate numerical methods and an analytical description in terms of nonlinear Bloch waves. The dependence of the breakdown on the lattice depth and the interaction strength is investigated. We show that it is possible to prohibit the self-trapping by applying a constant offset potential to the lattice region. Furthermore, we observe the disappearance of the self-trapped state after a finite time as a result of the revived expansion of the condensate through the lattice. This revived expansion is due to the finite width of the lattice.