Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Compactly supported linearised observables in single-field inflation   We investigate the gauge-invariant observables constructed by smearing the
graviton and inflaton fields by compactly supported tensors at linear order in
general single-field inflation. These observables correspond to gauge-invariant
quantities that can be measured locally. In particular, we show that these
observables are equivalent to (smeared) local gauge-invariant observables such
as the linearised Weyl tensor, which have better infrared properties than the
graviton and inflaton fields. Special cases include the equivalence between the
compactly supported gauge-invariant graviton observable and the smeared
linearised Weyl tensor in Minkowski and de Sitter spaces. Our results indicate
that the infrared divergences in the tensor and scalar perturbations in
single-field inflation have the same status as in de Sitter space and are both
a gauge artefact, in a certain technical sense, at tree level.

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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
3
The categories of this paper are: physics
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: cs
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin