Pre-inflation and trans-Planckian censorship  

作　　者：Yong Cai YunSong Piao 

机构地区：[1]School of Physics,University of Chinese Academy of Sciences,Beijing 100049,China [2]Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2020年第11期27-35,共9页中国科学：物理学、力学、天文学（英文版）

基　　金：suppoerted by the China Postdoctoral Science Foundation(Grant No.2019M650810);the National Natural Science Foundation of China(Grant No.11905224);supported by the National Natural Science Foundation of China(Grant Nos.11575188;and11690021);supported by the University of Chinese Academy of Sciences。

摘　　要：We investigate the implication of trans-Planckian censorship conjecture(TCC)for the initial state of primordial perturbations.It is possible to set the state of perturbation modes in the infinite past as the Minkowski vacuum,only if the pre-inflationary era is past-complete.We calculate the evolution of the perturbation modes in such a pre-inflationary era and show that at the beginning of inflation the perturbation modes with wavelengths much shorter than the Hubble scale(but still larger than the Planck length scale)will behave as they are in the Bunch-Davis state.Therefore,a past-complete pre-inflationary evolution may automatically prepare the initial state required for the inflationary perturbations at the CMB window while obeying the TCC.

关 键 词：INFLATION primordial perturbation trans-Planckian censorship conjecture 

分 类 号：P159[天文地球—天文学]