Reheating and entropy perturbations in fibre inflation

作     者：Bao-Min Gu Robert Brandenberger 古宝珉;Robert Brandenberger

作者机构：Department of PhysicsNanchang UniversityNanchang 330031China Center for Relativistic Astrophysics and High Energy PhysicsNanchang UniversityNanchang 330031China Department of PhysicsMcGill UniversityMontr′ealQCH3A 2T8Canada 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2020年第44卷第1期

页      面：136-148页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by a scholarship granted by the China Scholarship Council(CSC,201706180072) supported in part by funds from NSERC and from the Canada Research Chairs program 

主　　题：inflation preheating perturbations 

摘      要：We study reheating in some one and two field realizations of fibre *** find that reheating begins with a phase of preheating in which long wavelength fluctuation modes are *** two field models there is a danger that the parametric amplification of infrared fluctuations in the second scalar field-associated with an entropy mode-might induce an instability of the curvature *** show that,at least in the models we consider,the entropy mode has a sufficiently large mass to prevent this ***,from the point of view of reheating the models we consider are well-behaved.