scholarly journals Cosmological perturbation theory, instantaneous gauges, and local inertial frames

2007 ◽  
Vol 76 (6) ◽  
Author(s):  
Jiří Bičák ◽  
Joseph Katz ◽  
Donald Lynden-Bell
Keyword(s):  
Perturbation Theory ◽  
Cosmological Perturbation ◽  
Cosmological Perturbation Theory ◽  
Inertial Frames

Dragging of inertial frames by matter and waves

2021 ◽  
Author(s):  
Jiří Bičák ◽  
Tomáš Ledvinka
Keyword(s):  
Black Holes ◽  
Perturbation Theory ◽  
Inertial Frame ◽  
Cosmological Perturbation ◽  
Cosmological Perturbation Theory ◽  
Frame Dragging ◽  
Inertial Frames ◽  
Rotating Black Holes ◽  
Quantum Detection ◽  
General Relativistic

In this paper, we review and analyze four specific general-relativistic problems in which gravitomagnetism plays an important role: the dragging of magnetic fields around rotating black holes, dragging inside a collapsing slowly rotating spherical shell of dust, compared with the dragging by rotating gravitational waves. We demonstrate how the quantum detection of inertial frame dragging can be accomplished by using the Unruh–DeWitt detectors. Finally, we shall briefly show how “instantaneous Machian gauges” can be useful in the 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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