Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Closed Cosmological Model with Variable Lambda-term   We have studied the closed universe model with the variable cosmological
term, which is presented as a sum of two terms: Lambda=Lambda_0 -k R. First
term Lambda_0 is a constant and it is describing a sum of quantum field's zero
oscillations. In the geometrical sense it determines an own constant curvature
of the space-time. The second term is variable, it is proportional to curvature
of the space-time and can be interpretable as response of vacuum to curvature
of the space-time. In the framework of such model we have investigated the time
dynamic of Lambda-term and try to explain a mechanism which to give rise to a
large value of Lambda hence leading to the "cosmological constant problem". It
was studied models for different dark matter equation of state: p=0 and
p=varepsilon. It was shown that the presence of a variable Lambda-term alters
the evolution of the scale factor a in the very early epoch. In the context of
this model, a severe decrease of the module of vacuum energy density at the
primitive stage of Universe's development is explained. The numerical results
for the value of the Lambda-term agree with theoretical predictions for the
early epoch and with recent observation data.

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The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
16
The categories of this paper are: stat
19
The categories of this paper are: eess
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
2
The categories of this paper are: math