Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On tachyon and sub-quantum phantom cosmologies   This paper deals with dark and phantom energy in the tachyon and sub-quantum
models for dark energy. We obtain that the simplest condition for such a regime
to occur in these scenarios is that the scalar field be Wick rotated to
imaginary values which correspond to an axionic field classically. By
introducing analytical expressions for the scale factor or the Hubble parameter
that satisfy all constraint equations of the used models we show that such
models describe universes which develop a big rip singularity in the finite
future.

26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph