Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Holographic Cosmology   We present a new cosmological model, based on the holographic principle,
which shares many of the virtues of inflation. The very earliest semiclassical
era of the universe is dominated by a dense gas of black holes, with equation
of state $p=\rho$. Fluctuations lead to an instability to a phase with a dilute
gas of black holes, which later decays via Hawking radiation to a radiation
dominated universe. The quantum fluctuations of the initial state give rise to
a scale invariant spectrum of density perturbations, for a range of scales. We
point out a problem, that appears to prevent the range of scales predicted by
the model from coinciding with the range where such a spectrum has been
observed. We speculate that this may be related to our field theoretic
treatment of fluctuations in the highly holographic $p=\rho$ background. The
monopole problem is solved in a manner completely different from inflationary
models, and a relic density of highly charged extremal black monopoles is
predicted. We discuss the nature of the entropy and flatness problems in our
model.

13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg