Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some remarks about quantum diffusion for Hubbard models   Some exact results are given, that connect, for a general magnitude of the
interaction term $U$, the repulsive and attractive Hubbard model, in terms of
the eigenspectra and quantum diffusion properties. In particular, it is shown
that, for some initial conditions, the quantum evolution cannot differenciate
between the attractive and repulsive models. These results apply to both
fermionic and bosonic models, in any dimension and for general filling, as far
as the underlying structure is bipartite.

6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio