Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of Pre-inflation Conditions on Scalar and Tensor Perturbations in
  Inflation   The effect of the initial conditions in inflation on scalar and tensor
perturbations is investigated. Formulae for the power spectra of gravitational
waves and curvature perturbations for any initial conditions in inflation are
derived, and the ratio of scalar to tensor perturbations and spectral index are
calculated. The formulation is applied to some simplified pre-inflationary
cosmological models, and the differences of the ratio and spectral index are
investigated with respect to two matching conditions. In addition, the present
power spectrum of gravitational waves is derived. The proposed formulation is
preliminarily shown to be a possible test of the appropriateness of a given
pre-inflationary model.

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The categories of this paper are: q-alg
18
The categories of this paper are: econ
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The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat