Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Singularity Free Rainbow Universe   Isotropic quantum cosmological perfect fluid model is studied in the
formalism of Rainbow gravity. It is found that the only surviving matter degree
of freedom played the role of cosmic time. It is possible to find the wave
packet naturally with a suitable choice of the Rainbow functions which resulted
from the superposition of the wave functions of the
Schr$\ddot{o}$dinger-Wheeler-deWitt equation. The many-worlds interpretation of
quantum mechanics is applied to investigate the behavior of the scale factor
and the behaviour is found to depend on the operator ordering. It is shown that
the model in the Rainbow framework naturally avoids singularity and a bouncing
non-singular universe is found.

11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int