47 citations · 193 across the 11 of their papers we have counts for
6 papers · 1 filter
Scalar field cosmological models with finite scale factor singularities
Francesco Cannata, Alexander Yu. Kamenshchik, Daniele Regoli
We construct a scalar field based cosmological model, possessing a cosmological singularity characterized by a finite value of the cosmological radius and an infinite scalar curvat…
Reconstruction of scalar potentials in two-field cosmological models
Alexander A. Andrianov, Francesco Cannata, Alexander Y. Kamenshchik +1
We study the procedure of the reconstruction of phantom-scalar field potentials in two-field cosmological models. It is shown that while in the one-field case the chosen cosmologic…
Complex Lagrangians and phantom cosmology
A. A. Andrianov, F. Cannata, A. Y. Kamenshchik
Motivated by the generalization of quantum theory for the case of non-Hermitian Hamiltonians with PT symmetry, we show how a classical cosmological model describes a smooth transit…
Networks of cosmological histories, crossing of the phantom divide line and potentials with cusps
Francesco Cannata, Alexander Y. Kamenshchik
We discuss the phenomenon of the smooth dynamical gravity induced crossing of the phantom divide line in a framework of simple cosmological models where it appears to occur rather…
Phantom universe from CPT symmetric QFT
Alexander A. Andrianov, Francesco Cannata, Alexander Y. Kamenshchik
Inspired by the generalization of quantum theory for the case of non-Hermitian Hamiltonians with CPT symmetry, we construct a simple classical cosmological scalar field based model…
Smooth dynamical (de)-phantomization of a scalar field in simple cosmological models
Alexander A. Andrianov, Francesco Cannata, Alexander Y. Kamenshchik
Simple scalar field cosmological models are considered describing gravity assisted crossing of the phantom divide line. This crossing or (de)-phantomization characterized by the ch…