Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Holography and the scale-invariance of density fluctuations   We study a scenario for the very early universe in which there is a fast
phase transition from a non-geometric, high temperature phase to a low
temperature, geometric phase described by a classical solution to the Einstein
equations. In spite of the absence of a classical metric, the thermodynamics of
the high temperature phase may be described by making use of the holographic
principle. The thermal spectrum of fluctuations in the high temperature phase
manifest themselves after the phase transition as a scale invariant spectrum of
fluctuations. A simple model of the phase transition confirms that the near
scale invariance of the fluctuations is natural; but the model also withstands
detailed comparison with the data.

12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
16
The categories of this paper are: stat