Symmetries and loops in inflation
By Valentin Assassi, D. Baumann, D. Green. 2012
133 citations recorded by the source corpus.
A bstractIn 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.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/ff576f9387f54b8a62ac5b8f8777105d42ee8e9e
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In Astronomy and Astrophysics
In Nuclear and High Energy Physics
Citations in the corpus
- An infinite set of Ward identities for adiabatic modes in cosmology (2013, background): “16 The constancy of ζ in the low momentum limit has been shown quantum-mechanically in [31, 32].”
- Inflation, Cosmic Perturbations and Non-Gaussianities (2013, background): “Those consistency relations can also be checked by resuming the perturbation Hamiltonian with the presence of a classical mode of perturbation [121], or a result of unitary [122] or operator produce expansion [79].”
- The Cosmological Optical Theorem (2020, background): “That is part of the reason for the theoretical efforts made to provide general proofs for the immunity of curvature perturbations to such IR infinities (see [39, 40, 41, 42, 43, 44]).”