Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superfluid Density of Weakly Interacting Bosons on a Lattice   We use a path integral approach to calculate the superfluid density of a Bose
lattice gas in the limit where the number of atoms per site is large. Our
analytical expressions agree with numerical results on small systems for low
temperatures and relatively weak interactions. We also calculate the superfluid
density and drag for two-component lattice bosons. To attain the correct
results we develop tools for calculating discrete time path integrals. These
tools should be broadly applicable to a range of systems which are naturally
described within an overcomplete basis.

22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom