Volume 16, Issue 2 (9-2016)                   IJPR 2016, 16(2): 199-205 | Back to browse issues page



DOI: 10.18869/acadpub.ijpr.16.2.199

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Mohsenzadeh M, Yusofi E. Corrections of the spectra with de sitter background in Krein space. IJPR. 2016; 16 (2) :199-205
URL: http://ijpr.iut.ac.ir/article-1-2129-en.html

1. Department of Physics, Qom Branch, Islamic Azad University, Qom, Iran , mohsenzadeh@qom-iau.ac.ir
Abstract:   (1382 Views)

Gravitational waves are the last unconfirmed prediction of the general relativity. These waves are tiny fluctuations in world frame that dessipate energy throghout space. The gravitatinal waves spectra of fluctuations can be originated from the non-linear effects during different cosmic evolution periods, especially from initially non-linear and excited vacuum state in the very early universe. Based on this fact, in this paper introducing "excited-de Sitter vacuum" as a fundamental mode, the obtained power spectrum has been investigated. Corrected spectra obtained from Hilbert and Krein spaces are compared.The renormalization approach presented in this work, preserves the curved space-time symmetry and stimulates us to use excited de Sitter mode. Also, the corrections obtained from the non-linear mode includes the second-order corrections and in the linear limit accords with the results from conventional methods.

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Type of Study: Research | Subject: General

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