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 approxim...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.展开更多
基金Supported by the Natural Science Foundation of Chongqing,China(CSTB2022NSCQ-MSX0432)the Science and Technology Research Project of Chongqing Education Commission(KJQN202200621)+3 种基金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)。
文摘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.
