1106.0828 (J. Catani et al.)

Quantum dynamics of impurities in a 1D Bose gas    [PDF]

J. Catani, G. Lamporesi, D. Naik, M. Gring, M. Inguscio, F. Minardi, A. Kantian, T. Giamarchi

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.

View original: http://arxiv.org/abs/1106.0828