Effective field theory of non-attractor inflation

摘要: We present the model-independent studies of non attractor inflation in context effective field theory (EFT) inflation. Within EFT approach two independent branches non-attractor solutions are discovered which a near scale-invariant curvature perturbation power spectrum is generated from interplay between variation sound speed and second slow roll parameter η. The first branch captures extends previously studied models not frozen on super-horizon scales single non-Gaussianity consistency condition violated. general expression for amplitude local-type this branch. new does hold squeezed limit. Depending model parameters, shape bispectrum changes an equilateral configuration to folded while less than unity.