18 citations · 47 across the 5 of their papers we have counts for
5 papers
IR finite correlation functions in de Sitter space, a smooth massless limit, and an autonomous equation
Alexander Kamenshchik, Polina Petriakova
We explore two-point and four-point correlation functions of a massive scalar field on the flat de Sitter background in the long-wavelength approximation. By employing the Yang-Fel…
Regular Friedmann Universes and Matter Transformations
Alexander Kamenshchik, Polina Petriakova
We apply a very simple procedure to construct non-singular cosmological models for flat Friedmann universes filled with minimally coupled scalar fields or by tachyon Born-Infeld-ty…
Bianchi-I cosmologies, magnetic fields and singularities
Roberto Casadio, Alexander Kamenshchik, Panagiotis Mavrogiannis +1
We study the effects of a spatially homogenous magnetic field in Bianchi-I cosmological models. The cases of a pure magnetic field and two models with additional dust and a massles…
Newman-Janis algorithm's application to regular black hole models
Alexander Kamenshchik, Polina Petriakova
We examine the Newman-Janis algorithm's application to an exact regular static solution sustained by a minimally coupled scalar field with a non-standard kinetic term. Although coo…
Self-tuning inflation
Polina Petriakova, Sergey G. Rubin
We develop an inflationary model without small parameters on the basis of multidimensional gravity with a minimally coupled scalar field. The model is described by two stage…