2.6k citations · 7.8k across the 159 of their papers we have counts for
156 papers
Superpotential method and the amplification of inflationary perturbations
Alexander Y. Kamenshchik, Ekaterina O. Pozdeeva, Augustin Tribolet +3
The superpotential method is a reconstruction technique which has proven useful to build exact cosmological solutions. We here employ the superpotential method in order to reconstr…
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…
Mapping Solutions in Nonmetricity Gravity: Investigating Cosmological Dynamics in Conformal Equivalent Theories
Nikolaos Dimakis, Kevin Duffy, Alex Giacomini +3
We investigate the impact of conformal transformations on the physical properties of solution trajectories in nonmetricity gravity. Specifically, we explore the phase-space and rec…
Looking for Carroll particles in two time spacetime
Alexander Kamenshchik, Federica Muscolino
We make an attempt to describe Carroll particles with a non-vanishing value of energy (i.e. the Carroll particles which always stay in rest) in the framework of two time physics, d…
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…