Polaron Physics in Optical Lattices

Martin Bruderer, Alexander Klein, Stephen R. Clark, Dieter Jaksch

Research output: Contribution to journalArticle (Academic Journal)peer-review


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.
Original languageEnglish
Article number011605(R)
JournalPhysical Review A
Publication statusPublished - 13 Jul 2007

Bibliographical note

4 pages, 4 figures


  • quant-ph

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