No large scale curvature perturbations during the waterfall phase transition of hybrid inflation

摘要: In this paper the possibility of generating large scale curvature perturbations induced from entropic during waterfall phase transition standard hybrid inflation model is studied. We show that whether or not appreciable amounts are produced depends crucially on competition between classical and quantum mechanical backreactions to terminate inflation. If one considers only evolution system, we highly blue-tilted entropy induce which dominate over original adiabatic perturbations. However, field inhomogeneities completely backreactions. The cumulative very small tachyonic modes efficiently shut off perturbation transition. This indicates safe under