Constraints on real scalar inflation from preheating using LATTICEEASY  

作　　者：程伟 秦通 姜玖江 周瑞雨 Wei Cheng;Tong Qin;Jiujiang Jiang;Ruiyu Zhou(School of Science,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics,Chongqing University,Chongqing 401331,China)

机构地区：[1]School of Science,Chongqing University of Posts and Telecommunications,Chongqing 400065,China [2]Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics,Chongqing University,Chongqing 401331,China

出　　处：《Chinese Physics C》2024年第6期240-246,共7页中国物理C（英文版）

基　　金：Supported by the Natural Science Foundation of Chongqing,China(CSTB2022NSCQ-MSX0432);the Science and Technology Research Project of Chongqing Education Commission(KJQN202200621);the Chongqing Human Resources and Social Security Administration Program(D63012022005);Ruiyu Zhou was Supported by the Chongqing Natural Science Foundation(CSTB2022NSCQ-MSX0534);supported in part by the Fundamental Research Funds for the Central Universities(2021CDJQY-011);the National Natural Science Foundation of China(12147102)。

摘　　要：In this paper,we undertake a detailed study of real scalar inflation using LATTICEEASY simulations to investigate preheating phenomena.Generally,the scalar inflation potential with non-minimal coupling can be approximated using a quartic potential.We observe that the evolutionary behavior of this potential remains unaffected by the coupling coefficient.Furthermore,the theoretical predictions for the scalar spectral index(n_(s))and tensor-toscalar power ratio(r)are independent of this coefficient.Consequently,the coefficients of this model are not constrained by Planck observations.Fortunately,the properties of preheating after inflation provide a viable approach to examining these coefficients.Through LATTICEEASY simulations,we trace the evolution of particle number density,scale factor,and energy density during the preheating process.Subsequently,we derive the parameters,such as the energy ratio(γ)and the e-folding number of preheating(N_(pre)),which facilitate further predictions of n s and r.We successfully validate real scalar inflation model using preheating in LATTICEEASY simulations based on the analytical relationship between preheating and inflation models.

关 键 词：INFLATION latticeeasy PREHEATING 

分 类 号：P159[天文地球—天文学]