Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cyclic universe due to phantom and quintessence   We explore a cyclic universe due to phantom and quintessence fields. We find
that, in every cycle of the evolution of the universe, the phantom dominates
the cosmic early history and quintessence dominates the cosmic far future. In
this model of universe, there are infinite cycles of expansion and contraction.
Different from the inflationary universe, the corresponding cosmic space-time
is geodesically complete and quantum stable. But similar to the Cyclic Model,
the flatness problem, the horizon problem and the large scale structure of the
universe can be explained in this cyclic universe.

27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ