Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Emergent Universe Scenario via Quintom Matter   The emergent universe scenario provides a possible alternative to bouncing
cosmology to avoid the Big Bang singularity problem. In this paper we study the
realization of the emergent universe scenario by making use of Quintom matter
with an equation of state across the cosmological constant boundary. We will
show explicitly the analytic and numerical solutions of emergent universe in
two Quintom models, which are a phenomenological fluid and a nonconventional
spinor field, respectively.

27
The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph