Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum dynamics of impurities in a 1D Bose gas   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.

6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
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The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th