Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Minimal Sub-Planckian Axion Inflation Model with Large
  Tensor-to-Scalar Ratio   We present a minimal axion inflation model which can generate a large
tensor-to-scalar ratio while remaining sub-Planckian. The modulus of a complex
scalar field $\Phi$ with a $\lambda |\Phi|^4$ potential couples directly to the
gauge field of a strongly-coupled sector via a term of the form
$(|\Phi|/M_{Pl})^{m} F \tilde{F}$. This generates a minimum of the potential
which is aperiodic in the phase. The resulting inflation model is equivalent to
a $\phi^{4/(m+1)}$ chaotic inflation model. For the natural case of a
leading-order portal-like interaction $\Phi^{\dagger}\Phi F \tilde{F}$, the
model is equivalent to a $\phi^{4/3}$ chaotic inflation model and predicts a
tensor-to-scalar ratio $r = 16/3N = 0.097$ and a scalar spectral index $n_{s} =
1-5/3N = 0.970$. The value of $|\Phi|$ remains sub-Planckian throughout the
observable era of inflation, with $|\Phi| \lesssim 0.01 M_{Pl}$ for $N \lesssim
60$ when $\lambda \sim 1$.

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The categories of this paper are: acc-phys
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga