411 citations · 1k across the 22 of their papers we have counts for
15 papers · 1 filter
Tachyon cosmology, supernovae data and the Big Brake singularity
Z. Keresztes, L. Á. Gergely, V. Gorini +2
We compare the existing observational data on type Ia Supernovae with the evolutions of the universe predicted by a one-parameter family of tachyon models which we have introduced…
Special Relativity in the 21 century
S. Cacciatori, V. Gorini, A. Kamenshchik
This paper, which is meant to be a tribute to Minkowski's geometrical insight, rests on the idea that the basic observed symmetries of spacetime homogeneity and of isotropy of spac…
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…
Quantum cosmology with big-brake singularity
Alexander Kamenshchik, Claus Kiefer, Barbara Sandhoefer
We investigate a cosmological model with a big-brake singularity in the future: while the first time derivative of the scale factor goes to zero, its second time derivative tends t…
Symmetries and the cosmological constant puzzle
A. A. Andrianov, F. Cannata, P. Giacconi +2
We outline the evaluation of the cosmological constant in the framework of the standard field-theoretical treatment of vacuum energy and discuss the relation between the vacuum ene…