标题： 超视界扰动和预加热 显示英文标题

标题： Super-horizon perturbations and preheating

摘要： 巴斯克特等人最近声称，暴胀后的预加热可能会改变大尺度上曲率扰动的幅度，从而削弱通常的暴胀预测。 我们分析了最简单的模型，并证实了耶达姆齐克和西格尔以及伊瓦诺夫的结果，即在线性扰动理论中，这种效应是可以忽略不计的。 然而，主要效应是场扰动的二阶效应，我们证明了这一点同样可以忽略不计，因此得出结论，在这个模型中，预加热不会对大尺度扰动产生显著影响。 我们简要讨论了其他模型中可能出现的影响的可能性。 显示英文摘要

摘要： It has recently been claimed by Bassett et al that preheating after inflation may affect the amplitude of curvature perturbations on large scales, undermining the usual inflationary prediction. We analyze the simplest model, and confirm the results of Jedamzik and Sigl and of Ivanov that in linear perturbation theory the effect is negligible. However the dominant effect is second-order in the field perturbation and we show that this too is negligible, and hence conclude that preheating has no significant influence on large-scale perturbations in this model. We briefly discuss the likelihood of an effect in other models.