Polaron Physics in Optical Lattices


Bruderer, M., Klein, A., Clark, S. R. and Jaksch, D., 2007. Polaron Physics in Optical Lattices. Physical Review A: Atomic, Molecular, and Optical Physics, 76 (1), 011605(R).

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    We investigate the effects of a nearly uniform Bose-Einstein condensate (BEC) on the properties of immersed trapped impurity atoms. Using a weak-coupling expansion in the BEC-impurity interaction strength, we derive a model describing polarons, i.e., impurities dressed by a coherent state of Bogoliubov phonons, and apply it to ultracold bosonic atoms in an optical lattice. We show that, with increasing BEC temperature, the transport properties of the impurities change from coherent to diffusive. Furthermore, stable polaron clusters are formed via a phonon-mediated off-site attraction.


    Item Type Articles
    CreatorsBruderer, M., Klein, A., Clark, S. R. and Jaksch, D.
    Uncontrolled Keywordsquant-ph
    DepartmentsFaculty of Science > Physics
    ID Code47161
    Additional Information4 pages, 4 figures


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