Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The two-orbital Hubbard model and the OSMT   We analyze the two-orbital Hubbard model by means of the Composite Operator
Method with the aim at studying the phenomenon of orbital selective Mott
transition (OSMT). The model contains an interorbital interaction $U'$, in
addition to the usual intraorbital one $U$. As warming-up approximation, we use
a basis of two operators only, the Hubbard operators. The analysis of the
density of states at the chemical potential as a function of the ratio between
the bandwidths of the two orbitals shows the clear signature of an orbital
selective Mott transition as expected.

0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys