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- W3102105589 endingPage "043" @default.
- W3102105589 startingPage "043" @default.
- W3102105589 abstract "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." @default.
- W3102105589 created "2020-11-23" @default.
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- W3102105589 date "2017-07-25" @default.
- W3102105589 modified "2023-10-17" @default.
- W3102105589 title "Compactly supported linearised observables in single-field inflation" @default.
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- W3102105589 doi "https://doi.org/10.1088/1475-7516/2017/07/043" @default.
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