Volume 427 - 11th International Conference of the Balkan Physical Union (BPU11) - S03-GC Gravitation and Cosmology
Family of Gauge Invariant Variables for Scalar Perturbations During Inflation
N. Vesić*, D.D. Dimitrijević, G.S. Djordjević, M. Milošević and M. Stojanovic
*: corresponding author
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Published on: October 02, 2023
Abstract
Family of perturbation invariant variables for scalar cosmological perturbations is discussed in this paper. We follow the idea for obtaining the well known scalar-type perturbation invariants, i.e. the two Bardeen’s potentials, the Mukhanov-Sasaki variable and perturbation of an inflaton field, and obtained a family of scalar perturbation invariants. Based on this family, we obtained five linearly independent perturbation invariants and expressed the Bardeen’s potentials, the Mukhanov-Sasaki variable and perturbation of an inflaton field with respect to them.
DOI: https://doi.org/10.22323/1.427.0059
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