scholarly journals Cosmological perturbation theory with matter time

2020 ◽  
Vol 102 (12) ◽  
Author(s):  
Viqar Husain ◽  
Mustafa Saeed
Keyword(s):  
Perturbation Theory ◽  
Cosmological Perturbation ◽  
Cosmological Perturbation Theory

Delta N Formalism in Cosmological Perturbation Theory

10.1142/10953 ◽  
2018 ◽  
Author(s):  
Ali Akbar Abolhasani ◽  
Hassan Firouzjahi ◽  
Atsushi Naruko ◽  
Misao Sasaki
Keyword(s):  
Perturbation Theory ◽  
Cosmological Perturbation ◽  
Cosmological Perturbation Theory

COSMOLOGICAL PERTURBATIONS IN GENERALIZED GRAVITY THEORIES

2004 ◽  
Vol 19 (13n16) ◽  
pp. 1203-1206 ◽  
Author(s):  
HYERIM NOH ◽  
JAI-CHAN HWANG
Keyword(s):  
Perturbation Theory ◽  
Cosmological Perturbations ◽  
Cosmological Perturbation ◽  
Cosmological Perturbation Theory ◽  
String Correction ◽  
Gravity Theories ◽  
Correction Terms ◽  
Classical Evolution

We present cosmological perturbation theory based on generalized gravity theories including string correction terms as well as a tachyonic complication. The classical evolution as well as the quantum generation processes in these variety of gravity theories are presented in unified forms. These apply both to the scalar- and tensor-type perturbations.

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