Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fine Tuning May Not Be Enough   We argue that the fine tuning problems of scalar-driven inflation may be
worse than is commonly believed. The reason is that reheating requires the
inflaton to be coupled to other matter fields whose vacuum fluctuations alter
the inflaton potential. The usual response has been that even more fine-tuning
of the classical potential $V(\varphi)$ can repair any damage done in this way.
We point out that the effective potential in de Sitter background actually
depends in a complicated way upon the dimensionless combination of $\varphi/H$.
We also show that the factors of $H$ which occur in de Sitter do not even
correspond to local functionals of the metric for general geometries, nor are
they Planck-suppressed.

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The categories of this paper are: physics
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The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: math