无平坦方向且无原始黑洞的混合型暴胀

我们研究了宇宙可能由于表示超对称性中平坦方向的模场（由超引力修正作用产生的）而进行暴胀的可能性。使用混合型势能，我们获得一个两阶段的暴胀模型。 Depending on the potential 的曲率，第一阶段对应于快速滚动暴胀或由振荡的暴胀场引起的“锁定”暴胀，这随后是快速滚动暴胀的第二阶段。我们展示，这两个连续的暴胀阶段足以产生足够的总 e 展开来涵盖宇宙尺度。Using natural values for the parameters (masses of order TeV and vacuum energy of the intermediate scale corresponding to gravity mediated supersymmetry breaking) we conclude that the $\eta$-problem of inflation is easily overcome. The greatest obstacle to our scenario is the possibility of copious production of cosmologically disastrous primordial black holes due to the phase transition switching from the first into the second stage of inflation. We study this problem in detail and show analytically that there is ample parameter space where these black holes do not form at all. To generate structure in the Universe we assume the presence of a curvaton field. Finally we also discuss the moduli problem and how it affects our considerations.