The Effective Field Theory of Inflation

摘要: We study the effective field theory of inflation, i.e. most general describing fluctuations around a quasi de Sitter background, in case single models. The scalar mode can be eaten by metric going to unitary gauge. In this gauge, is built with lowest dimension operators invariant under spatial diffeomorphisms, like g^{00} and K_{mu nu}, extrinsic curvature constant time surfaces. This approach allows us characterize all possible high energy corrections simple slow-roll whose sizes are constrained experiments. Also, it describes common language models, including those small speed sound Ghost Inflation, makes explicit implications having background. non-linear realization diffeomorphisms forces correlation among different observables, reduced an enhanced level non-Gaussianity.