Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ginzburg-Landau expansion and the upper critical field in disordered
  attractive Hubbard model   We present a short review of our studies of disorder influence upon Ginzburg
- Landau expansion coefficients in Anderson - Hubbard model with attraction in
the framework of the generalized DMFT+$\Sigma$ approximation. A wide range of
attractive potentials $U$ is considered - from weak coupling limit, where
superconductivity is described by BCS model, to the limit of very strong
coupling, where superconducting transition is related to Bose - Einstein
condensation (BEC) of compact Cooper pairs, which are formed at temperatures
significantly higher than the temperature of superconducting transition, as
well as the wide range of disorders - from weak to strong, when the system is
in the vicinity of Anderson transition. For the same range of parameters we
study in detail the temperature behavior of orbital and paramagnetic upper
critical field $H_{c2}(T)$, which demonstrates the anomalies both due to the
growth of attractive potential and the effects of strong disordering.

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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
18
The categories of this paper are: econ