Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multi-fluid potential in the loop cosmology   The scalar field can behave like a fluid with equation of state
$p_{\phi}=w\rho_{\phi}$, where $w \in [-1,1]$. In this Letter we derive a class
of the scalar field potentials for which $w=$ const. Scalar field with such a
potential can mimic ordinary matter, radiation, cosmic strings, etc. We perform
our calculations in the framework of the loop cosmology with holonomy
corrections. We solve the model analytically for the whole parameter space.
Subsequently, we perform similar consideration for the model with a phantom
field ($w<-1$). We show that scalar field is monotonic function in both cases.
This indicates that it can be treated as a well-defined internal time for these
models. Moreover we perform preliminary studies of the scalar field
perturbations with this potential. We indicate that non-Gaussian features are
present admitting for the possible observational constraints of the model.

18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas