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Invariant Dynamics of Scalar Perturbations of Inflanton and Gravitational Fields by Lalakulich, O.; Marochnik, L.; Vereshkov, G. is a scholarly article available to read on EtoBox.

What is Invariant Dynamics of Scalar Perturbations of Inflanton and Gravitational Fields about?

A gauge-independent, invariant theory of linear scalar perturbations of inflation and gravitational fields has been created. This invariant theory allows one to compare gauges used in the work of other researchers and to find the unambiguous criteria to separate the physical and coordinate effects. It is shown, in particular, that the so-called longitudial gauge, commonly used when considering inflation instability, leads to a fundamental overestimation of the effect because of non-physical perturbations of the proper time in the frame of reference specified by this gauge. Back reaction theories employing this sort of gauge [1] also involve coordinate effects. The invariant theory created here shows that the classical Lifshitz (1946) [2] gauge does not lead to non-physical perturbations of the proper time and can be used to analyze the inflation regime and the back reaction of perturbations on this regime properly. The first theory of back reaction on background of all types of perturbations (scalar, vector and tensor) based on this gauge was published in 1975 [3] and has been applied recently to the inflation [4]. The investigation of long-length perturbations, which characterize

Author

Lalakulich, O.; Marochnik, L.; Vereshkov, G.

Published

2001

Language

EN