2011/06/30 by J. Catani, G. Lamporesi, D. Naik +5 · 3 citations
Physics and Astronomy · #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.85.023623
published as Phys. Rev. A 85, 023623 (2012) · 7 pages, 6 figures
arxiv created 2012/02/21 · arxiv updated 2012/02/22
Using a species-selective dipole potential, we create initially localized impurities and investigate their interactions with a majority species of bosonic atoms in a one-dimensional configuration during expansion. We find an interaction-dependent amplitude reduction of the oscillation of the impurities' size with no measurable frequency shift, and study it as a function of the interaction strength. We discuss possible theoretical interpretations of the data. We compare, in particular, with a polaronic mass shift model derived following Feynman variational approach.