Non-linear trans-Planckian corrections of spectra due to the non-trivial initial states

被引：15

作者：

Yusofi, E. ^{[1
]}

Mohsenzadeh, M. ^{[2
]}

机构：

[1] Islamic Azad Univ, Sci & Res Branch, Dept Phys, Tehran, Iran

[2] Islamic Azad Univ, Qom Branch, Dept Phys, Qom, Iran

来源：

PHYSICS LETTERS B | 2014年 / 735卷

关键词：

KREIN; INFLATION;

D O I：

10.1016/j.physletb.2014.06.054

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recent Planck results motivated us to use non-Bunch-Davies vacuum. In this paper, we use the excited-de Sitter mode as non-linear initial states during inflation to calculate the corrected spectra of the initial fluctuations of the scalar field. First, we consider the field in de Sitter space-time as background field and for the non-Bunch-Davies mode, we use the perturbation theory to the second order approximation. Also, unlike conventional renormalization method, we offer de Sitter space-time as the background instead Minkowski space-time. This approach preserve the symmetry of curved space-time and stimulate us to use excited mode. By taking into account this alternative mode and the effects of trans-Planckian physics, we calculate the power spectrum in standard approach and Danielsson argument. The calculated power spectrum with this method is finite, corrections of it is non-linear, and in de Sitter limit corrections reduce to linear form that obtained from several previous conventional methods. (C) 2014 The Authors. Published by Elsevier B.V.

引用

页码：261 / 265

页数：5

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