Abstract
In this paper, we prove that the superhorizon conservation of the curvature perturbation ζ in single-field inflation holds as an operator statement. This implies that all ζ-correlators are time independent at all orders in the loop expansion. Our result follows directly from locality and diffeomorphism invariance of the underlying theory. We also explore the relationship between the conservation of ζ, the single-field consistency relation and the renormalization of composite operators.
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ArXiv ePrint: 1210.7792
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Assassi, V., Baumann, D. & Green, D. Symmetries and loops in inflation. J. High Energ. Phys. 2013, 151 (2013). https://doi.org/10.1007/JHEP02(2013)151
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DOI: https://doi.org/10.1007/JHEP02(2013)151