Inflation in Non-de Sitter Background with Coherent States  

作　　者：E.Yusofi M.Mohsenzadeh M.R.Tanhayi 

机构地区：[1]Department of Physics,Ayatollah Amoli Branch,Islamic Azad University [2]Department of Physics,Qom Branch,Islamic Azad University [3]Department of Physics,Islamic Azad University,Central Tehran Branch

出　　处：《Communications in Theoretical Physics》2016年第3期308-314,共7页理论物理通讯（英文版）

基　　金：supported by the Islamic Azad University,Ayatollah Amoli Branch, Amol,Mazandaran,Iran

摘　　要：We use the excited coherent states built over the initial non-de Sitter modes,to study the modification of spectra of primordial scalar fluctuation.Non-de Sitter modes are actually the asymptotic solution of the inflaton field equation[J.High Energy Phys.09（2014） 020].We build excited coherent states over the non-de Sitter modes and despite the Jack of interactions in the Lagrangian,we find a non-zero one-point function.It is shown that the primordial non-Gaussianity resulting from excited-de Sitter modes depend both of time and background space-time.It is very tiny of order（≤10^-24）,at the Planck initial fixed time that confirmed by resent observations for single field inflation but it grows in the present epoch.Moreover,our results at the leading order are similar to what obtained with general initial states and in the dS limit leads to standard results[J.Cosmol.Astropart.Phys.1202（2012） 005].We will show that the non-dS modes and its resulting spectrum are more usable for far past time limit.

关 键 词：INFLATION initial states planck time background space-time 

分 类 号：F821.5[经济管理—财政学]