It is shown that the squeezed limit of inflationary expectation values follows from reparametrization invariance of the wavefunction of the universe. This translates into a constraint on the longitudinal modes of functional derivatives of the wavefunction. Thus, the local non-Gaussianity induced by single field inflation is purely a gauge artifact. We focus on Einstein gravity in de Sitter space and single field inflation, although the formalism only relies on the diffeomorphism invariance of the theory, and thus applies to any theory of gravity. © 2014 The Authors.

Inflationary consistency conditions from a wavefunctional perspective

Leite Pimentel, Guilherme
2014

Abstract

It is shown that the squeezed limit of inflationary expectation values follows from reparametrization invariance of the wavefunction of the universe. This translates into a constraint on the longitudinal modes of functional derivatives of the wavefunction. Thus, the local non-Gaussianity induced by single field inflation is purely a gauge artifact. We focus on Einstein gravity in de Sitter space and single field inflation, although the formalism only relies on the diffeomorphism invariance of the theory, and thus applies to any theory of gravity. © 2014 The Authors.
2014
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
Classical Theories of Gravity; Models of Quantum Gravity
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/129445
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