Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bound states and expansion dynamics of interacting bosons on a
  one-dimensional lattice   The expansion dynamics of bosonic gases in optical lattices has recently been
the focus of increasing attention, both experimental and theoretical. We
consider, by means of numerical Bethe ansatz, the expansion dynamics of
initially confined wave packets of two interacting bosons on a lattice. We show
that a correspondence between the asymptotic expansion velocities and the
projection of the evolved wave function over the bound states of the system
exists, clarifying the existing picture for such situations. Moreover, we
investigate the role of the lattice in this kind of evolution.

22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin